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C# (programming language)
Reflection in C#
 Что такое рефлексия (отражение) в C# ? 
посмотрели 13668 раз
обновлено: 30 October 2018
Рефлексия это:
• определение типа у обьекта во время выполнения приложения.
• это определение свойств, методов у объекта во время выполнения приложения.

Рефлексия позволяет динамически загружать сборку и
• исследовать эту сборку (узнать какие там классы, методы и т.д.)
• создавать экземпляры типов из сборки
Получение типа у объекта
Type type = ВашОбъект.GetType();
Пример
  C#     Создаем новое C# консольное приложение... и напишем код
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
     class Program
     {
          static void Main(string[] args)
          {
               int value1 = 24;

               // получаем тип
               Type type = value1.GetType();

               // type.Name = "Int32"
          }
     }
}
Класс Type
Type - представляет информацию о типе

namespace System

Версия .NETFramework\v4.6.1\mscorlib.dll

Синтаксис
public abstract class Type : MemberInfo, _Type, IReflect

Constructors
protected Type();
Initializes a new instance of the System.Type class.

Properties
public static readonly char Delimiter;
Separates names in the namespace of the System.Type. This field is read-only.
public static readonly Type[] EmptyTypes;
Represents an empty array of type System.Type. This field is read-only.
public static readonly MemberFilter FilterAttribute;
Represents the member filter used on attributes. This field is read-only.
public static readonly MemberFilter FilterName;
Represents the case-sensitive member filter used on names. This field is read-only.
public static readonly MemberFilter FilterNameIgnoreCase;
Represents the case-insensitive member filter used on names. This field is read-only.
public static readonly object Missing;
Represents a missing value in the System.Type information. This field is read-only.
public static bool operator !=(Type left, Type right);
Indicates whether two System.Type objects are not equal. Полное описание ...
public static bool operator ==(Type left, Type right);
Indicates whether two System.Type objects are equal. Полное описание ...
public abstract Assembly Assembly { get; }
Gets the System.Reflection.Assembly in which the type is declared. For generic types, gets the System.Reflection.Assembly in which the generic type is defined. Полное описание ...
public abstract string AssemblyQualifiedName { get; }
Gets the assembly-qualified name of the type, which includes the name of the assembly from which this System.Type object was loaded. Полное описание ...
public TypeAttributes Attributes { get; }
Gets the attributes associated with the System.Type. Полное описание ...
public abstract Type BaseType { get; }
Gets the type from which the current System.Type directly inherits. Полное описание ...
public virtual bool ContainsGenericParameters { get; }
Gets a value indicating whether the current System.Type object has type parameters that have not been replaced by specific types. Полное описание ...
public virtual MethodBase DeclaringMethod { get; }
Gets a System.Reflection.MethodBase that represents the declaring method, if the current System.Type represents a type parameter of a generic method. Полное описание ...
public override Type DeclaringType { get; }
Gets the type that declares the current nested type or generic type parameter. Полное описание ...
public static Binder DefaultBinder { get; }
Gets a reference to the default binder, which implements internal rules for selecting the appropriate members to be called by System.Type.InvokeMember( System.String, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object,System.Object[],S ystem.Reflection.ParameterModifier[], System.Globalization.CultureInfo, System.String[]). Полное описание ...
public abstract string FullName { get; }
Gets the fully qualified name of the type, including its namespace but not its assembly. Полное описание ...
public virtual GenericParameterAttributes GenericParameterAttributes { get; }
Gets a combination of System.Reflection.GenericParameterAttributes flags that describe the covariance and special constraints of the current generic type parameter. Полное описание ...
public virtual int GenericParameterPosition { get; }
Gets the position of the type parameter in the type parameter list of the generic type or method that declared the parameter, when the System.Type object represents a type parameter of a generic type or a generic method. Полное описание ...
public virtual Type[] GenericTypeArguments { get; }
Gets an array of the generic type arguments for this type. Полное описание ...
public abstract Guid GUID { get; }
Gets the GUID associated with the System.Type. Полное описание ...
public bool HasElementType { get; }
Gets a value indicating whether the current System.Type encompasses or refers to another type; that is, whether the current System.Type is an array, a pointer, or is passed by reference. Полное описание ...
public bool IsAbstract { get; }
Gets a value indicating whether the System.Type is abstract and must be overridden. Полное описание ...
public bool IsAnsiClass { get; }
Gets a value indicating whether the string format attribute AnsiClass is selected for the System.Type. Полное описание ...
public bool IsArray { get; }
Gets a value that indicates whether the type is an array. Полное описание ...
public bool IsAutoClass { get; }
Gets a value indicating whether the string format attribute AutoClass is selected for the System.Type. Полное описание ...
public bool IsAutoLayout { get; }
Gets a value indicating whether the fields of the current type are laid out automatically by the common language runtime. Полное описание ...
public bool IsByRef { get; }
Gets a value indicating whether the System.Type is passed by reference. Полное описание ...
public bool IsClass { get; }
Gets a value indicating whether the System.Type is a class or a delegate; that is, not a value type or interface. Полное описание ...
public bool IsCOMObject { get; }
Gets a value indicating whether the System.Type is a COM object. Полное описание ...
public virtual bool IsConstructedGenericType { get; }
Gets a value that indicates whether this object represents a constructed generic type. You can create instances of a constructed generic type. Полное описание ...
public bool IsContextful { get; }
Gets a value indicating whether the System.Type can be hosted in a context. Полное описание ...
public virtual bool IsEnum { get; }
Gets a value indicating whether the current System.Type represents an enumeration. Полное описание ...
public bool IsExplicitLayout { get; }
Gets a value indicating whether the fields of the current type are laid out at explicitly specified offsets. Полное описание ...
public virtual bool IsGenericParameter { get; }
Gets a value indicating whether the current System.Type represents a type parameter in the definition of a generic type or method. Полное описание ...
public virtual bool IsGenericType { get; }
Gets a value indicating whether the current type is a generic type. Полное описание ...
public virtual bool IsGenericTypeDefinition { get; }
Gets a value indicating whether the current System.Type represents a generic type definition, from which other generic types can be constructed. Полное описание ...
public bool IsImport { get; }
Gets a value indicating whether the System.Type has a System.Runtime.InteropServices.ComImportAttribute attribute applied, indicating that it was imported from a COM type library. Полное описание ...
public bool IsInterface { get; }
Gets a value indicating whether the System.Type is an interface; that is, not a class or a value type. Полное описание ...
public bool IsLayoutSequential { get; }
Gets a value indicating whether the fields of the current type are laid out sequentially, in the order that they were defined or emitted to the metadata. Полное описание ...
public bool IsMarshalByRef { get; }
Gets a value indicating whether the System.Type is marshaled by reference. Полное описание ...
public bool IsNested { get; }
Gets a value indicating whether the current System.Type object represents a type whose definition is nested inside the definition of another type. Полное описание ...
public bool IsNestedAssembly { get; }
Gets a value indicating whether the System.Type is nested and visible only within its own assembly. Полное описание ...
public bool IsNestedFamANDAssem { get; }
Gets a value indicating whether the System.Type is nested and visible only to classes that belong to both its own family and its own assembly. Полное описание ...
public bool IsNestedFamily { get; }
Gets a value indicating whether the System.Type is nested and visible only within its own family. Полное описание ...
public bool IsNestedFamORAssem { get; }
Gets a value indicating whether the System.Type is nested and visible only to classes that belong to either its own family or to its own assembly. Полное описание ...
public bool IsNestedPrivate { get; }
Gets a value indicating whether the System.Type is nested and declared private. Полное описание ...
public bool IsNestedPublic { get; }
Gets a value indicating whether a class is nested and declared public. Полное описание ...
public bool IsNotPublic { get; }
Gets a value indicating whether the System.Type is not declared public. Полное описание ...
public bool IsPointer { get; }
Gets a value indicating whether the System.Type is a pointer. Полное описание ...
public bool IsPrimitive { get; }
Gets a value indicating whether the System.Type is one of the primitive types. Полное описание ...
public bool IsPublic { get; }
Gets a value indicating whether the System.Type is declared public. Полное описание ...
public bool IsSealed { get; }
Gets a value indicating whether the System.Type is declared sealed. Полное описание ...
public virtual bool IsSecurityCritical { get; }
Gets a value that indicates whether the current type is security-critical or security-safe-critical at the current trust level, and therefore can perform critical operations. Полное описание ...
public virtual bool IsSecuritySafeCritical { get; }
Gets a value that indicates whether the current type is security-safe-critical at the current trust level; that is, whether it can perform critical operations and can be accessed by transparent code. Полное описание ...
public virtual bool IsSecurityTransparent { get; }
Gets a value that indicates whether the current type is transparent at the current trust level, and therefore cannot perform critical operations. Полное описание ...
public virtual bool IsSerializable { get; }
Gets a value indicating whether the System.Type is serializable. Полное описание ...
public bool IsSpecialName { get; }
Gets a value indicating whether the type has a name that requires special handling. Полное описание ...
public bool IsUnicodeClass { get; }
Gets a value indicating whether the string format attribute UnicodeClass is selected for the System.Type. Полное описание ...
public bool IsValueType { get; }
Gets a value indicating whether the System.Type is a value type. Полное описание ...
public bool IsVisible { get; }
Gets a value indicating whether the System.Type can be accessed by code outside the assembly. Полное описание ...
public override MemberTypes MemberType { get; }
Gets a System.Reflection.MemberTypes value indicating that this member is a type or a nested type. Полное описание ...
public abstract Module Module { get; }
Gets the module (the DLL) in which the current System.Type is defined. Полное описание ...
public abstract string Namespace { get; }
Gets the namespace of the System.Type. Полное описание ...
public override Type ReflectedType { get; }
Gets the class object that was used to obtain this member. Полное описание ...
public virtual StructLayoutAttribute StructLayoutAttribute { get; }
Gets a System.Runtime.InteropServices.StructLayoutAttribute that describes the layout of the current type. Полное описание ...
public virtual RuntimeTypeHandle TypeHandle { get; }
Gets the handle for the current System.Type. Полное описание ...
public ConstructorInfo TypeInitializer { get; }
Gets the initializer for the type. Полное описание ...
public abstract Type UnderlyingSystemType { get; }
Indicates the type provided by the common language runtime that represents this type. Полное описание ...

Methods
public override bool Equals(object o);
Determines if the underlying system type of the current System.Type is the same as the underlying system type of the specified System.Object. Полное описание ...
public virtual bool Equals(Type o);
Determines if the underlying system type of the current System.Type is the same as the underlying system type of the specified System.Type. Полное описание ...
public virtual Type[] FindInterfaces(TypeFilter filter, object filterCriteria);
Returns an array of System.Type objects representing a filtered list of interfaces implemented or inherited by the current System.Type. Полное описание ...
public virtual MemberInfo[] FindMembers(MemberTypes memberType, BindingFlags bindingAttr, MemberFilter filter, object filterCriteria);
Returns a filtered array of System.Reflection.MemberInfo objects of the specified member type. Полное описание ...
public virtual int GetArrayRank();
Gets the number of dimensions in an array. Полное описание ...
protected abstract TypeAttributes GetAttributeFlagsImpl();
When overridden in a derived class, implements the System.Type.Attributes property and gets a bitmask indicating the attributes associated with the System.Type. Полное описание ...
public ConstructorInfo GetConstructor(Type[] types);
Searches for a public instance constructor whose parameters match the types in the specified array. Полное описание ...
public ConstructorInfo GetConstructor(BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers);
Searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints. Полное описание ...
public ConstructorInfo GetConstructor(BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers);
Searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention. Полное описание ...
protected abstract ConstructorInfo GetConstructorImpl(BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers);
When overridden in a derived class, searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention. Полное описание ...
public ConstructorInfo[] GetConstructors();
Returns all the public constructors defined for the current System.Type. Полное описание ...
public abstract ConstructorInfo[] GetConstructors(BindingFlags bindingAttr);
When overridden in a derived class, searches for the constructors defined for the current System.Type, using the specified BindingFlags. Полное описание ...
public virtual MemberInfo[] GetDefaultMembers();
Searches for the members defined for the current System.Type whose System.Reflection.DefaultMemberAttribute is set. Полное описание ...
public abstract Type GetElementType();
When overridden in a derived class, returns the System.Type of the object encompassed or referred to by the current array, pointer or reference type. Полное описание ...
public virtual string GetEnumName(object value);
Returns the name of the constant that has the specified value, for the current enumeration type. Полное описание ...
public virtual string[] GetEnumNames();
Returns the names of the members of the current enumeration type. Полное описание ...
public virtual Type GetEnumUnderlyingType();
Returns the underlying type of the current enumeration type. Полное описание ...
public virtual Array GetEnumValues();
Returns an array of the values of the constants in the current enumeration type. Полное описание ...
public EventInfo GetEvent(string name);
Returns the System.Reflection.EventInfo object representing the specified public event. Полное описание ...
public abstract EventInfo GetEvent(string name, BindingFlags bindingAttr);
When overridden in a derived class, returns the System.Reflection.EventInfo object representing the specified event, using the specified binding constraints. Полное описание ...
public virtual EventInfo[] GetEvents();
Returns all the public events that are declared or inherited by the current System.Type. Полное описание ...
public abstract EventInfo[] GetEvents(BindingFlags bindingAttr);
When overridden in a derived class, searches for events that are declared or inherited by the current System.Type, using the specified binding constraints. Полное описание ...
public FieldInfo GetField(string name);
Searches for the public field with the specified name. Полное описание ...
public abstract FieldInfo GetField(string name, BindingFlags bindingAttr);
Searches for the specified field, using the specified binding constraints. Полное описание ...
public FieldInfo[] GetFields();
Returns all the public fields of the current System.Type. Полное описание ...
public abstract FieldInfo[] GetFields(BindingFlags bindingAttr);
When overridden in a derived class, searches for the fields defined for the current System.Type, using the specified binding constraints. Полное описание ...
public virtual Type[] GetGenericArguments();
Returns an array of System.Type objects that represent the type arguments of a closed generic type or the type parameters of a generic type definition. Полное описание ...
public virtual Type[] GetGenericParameterConstraints();
Returns an array of System.Type objects that represent the constraints on the current generic type parameter. Полное описание ...
public virtual Type GetGenericTypeDefinition();
Returns a System.Type object that represents a generic type definition from which the current generic type can be constructed. Полное описание ...
public override int GetHashCode();
Returns the hash code for this instance. Полное описание ...
public Type GetInterface(string name);
Searches for the interface with the specified name. Полное описание ...
public abstract Type GetInterface(string name, bool ignoreCase);
When overridden in a derived class, searches for the specified interface, specifying whether to do a case-insensitive search for the interface name. Полное описание ...
public virtual InterfaceMapping GetInterfaceMap(Type interfaceType);
Returns an interface mapping for the specified interface type. Полное описание ...
public abstract Type[] GetInterfaces();
When overridden in a derived class, gets all the interfaces implemented or inherited by the current System.Type. Полное описание ...
public MemberInfo[] GetMember(string name);
Searches for the public members with the specified name. Полное описание ...
public virtual MemberInfo[] GetMember(string name, BindingFlags bindingAttr);
Searches for the specified members, using the specified binding constraints. Полное описание ...
public virtual MemberInfo[] GetMember(string name, MemberTypes type, BindingFlags bindingAttr);
Searches for the specified members of the specified member type, using the specified binding constraints. Полное описание ...
public MemberInfo[] GetMembers();
Returns all the public members of the current System.Type. Полное описание ...
public abstract MemberInfo[] GetMembers(BindingFlags bindingAttr);
When overridden in a derived class, searches for the members defined for the current System.Type, using the specified binding constraints. Полное описание ...
public MethodInfo GetMethod(string name);
Searches for the public method with the specified name. Полное описание ...
public MethodInfo GetMethod(string name, BindingFlags bindingAttr);
Searches for the specified method, using the specified binding constraints. Полное описание ...
public MethodInfo GetMethod(string name, Type[] types);
Searches for the specified public method whose parameters match the specified argument types. Полное описание ...
public MethodInfo GetMethod(string name, Type[] types, ParameterModifier[] modifiers);
Searches for the specified public method whose parameters match the specified argument types and modifiers. Полное описание ...
public MethodInfo GetMethod(string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers);
Searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints. Полное описание ...
public MethodInfo GetMethod(string name, BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers);
Searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention. Полное описание ...
protected abstract MethodInfo GetMethodImpl(string name, BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers);
When overridden in a derived class, searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention. Полное описание ...
public MethodInfo[] GetMethods();
Returns all the public methods of the current System.Type. Полное описание ...
public abstract MethodInfo[] GetMethods(BindingFlags bindingAttr);
When overridden in a derived class, searches for the methods defined for the current System.Type, using the specified binding constraints. Полное описание ...
public Type GetNestedType(string name);
Searches for the public nested type with the specified name. Полное описание ...
public abstract Type GetNestedType(string name, BindingFlags bindingAttr);
When overridden in a derived class, searches for the specified nested type, using the specified binding constraints. Полное описание ...
public Type[] GetNestedTypes();
Returns the public types nested in the current System.Type. Полное описание ...
public abstract Type[] GetNestedTypes(BindingFlags bindingAttr);
When overridden in a derived class, searches for the types nested in the current System.Type, using the specified binding constraints. Полное описание ...
public PropertyInfo[] GetProperties();
Returns all the public properties of the current System.Type. Полное описание ...
public abstract PropertyInfo[] GetProperties(BindingFlags bindingAttr);
When overridden in a derived class, searches for the properties of the current System.Type, using the specified binding constraints. Полное описание ...
public PropertyInfo GetProperty(string name);
Searches for the public property with the specified name. Полное описание ...
public PropertyInfo GetProperty(string name, BindingFlags bindingAttr);
Searches for the specified property, using the specified binding constraints. Полное описание ...
public PropertyInfo GetProperty(string name, Type returnType);
Searches for the public property with the specified name and return type. Полное описание ...
public PropertyInfo GetProperty(string name, Type[] types);
Searches for the specified public property whose parameters match the specified argument types. Полное описание ...
public PropertyInfo GetProperty(string name, Type returnType, Type[] types);
Searches for the specified public property whose parameters match the specified argument types. Полное описание ...
public PropertyInfo GetProperty(string name, Type returnType, Type[] types, ParameterModifier[] modifiers);
Searches for the specified public property whose parameters match the specified argument types and modifiers. Полное описание ...
public PropertyInfo GetProperty(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers);
Searches for the specified property whose parameters match the specified argument types and modifiers, using the specified binding constraints. Полное описание ...
protected abstract PropertyInfo GetPropertyImpl(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers);
When overridden in a derived class, searches for the specified property whose parameters match the specified argument types and modifiers, using the specified binding constraints. Полное описание ...
public Type GetType();
Gets the current System.Type. Полное описание ...
public static Type GetType(string typeName);
Gets the System.Type with the specified name, performing a case-sensitive search. Полное описание ...
public static Type GetType(string typeName, bool throwOnError);
Gets the System.Type with the specified name, performing a case-sensitive search and specifying whether to throw an exception if the type is not found. Полное описание ...
public static Type GetType(string typeName, bool throwOnError, bool ignoreCase);
Gets the System.Type with the specified name, specifying whether to throw an exception if the type is not found and whether to perform a case-sensitive search. Полное описание ...
public static Type GetType(string typeName, Func<AssemblyName, Assembly> assemblyResolver, Func<Assembly, string, bool, Type> typeResolver);
Gets the type with the specified name, optionally providing custom methods to resolve the assembly and the type. Полное описание ...
public static Type GetType(string typeName, Func<AssemblyName, Assembly> assemblyResolver, Func<Assembly, string, bool, Type> typeResolver, bool throwOnError);
Gets the type with the specified name, specifying whether to throw an exception if the type is not found, and optionally providing custom methods to resolve the assembly and the type. Полное описание ...
public static Type GetType(string typeName, Func<AssemblyName, Assembly> assemblyResolver, Func<Assembly, string, bool, Type> typeResolver, bool throwOnError, bool ignoreCase);
Gets the type with the specified name, specifying whether to perform a case-sensitive search and whether to throw an exception if the type is not found, and optionally providing custom methods to resolve the assembly and the type. Полное описание ...
public static Type[] GetTypeArray(object[] args);
Gets the types of the objects in the specified array. Полное описание ...
public static TypeCode GetTypeCode(Type type);
Gets the underlying type code of the specified System.Type. Полное описание ...
protected virtual TypeCode GetTypeCodeImpl();
Returns the underlying type code of the specified System.Type. Полное описание ...
public static Type GetTypeFromCLSID(Guid clsid);
Gets the type associated with the specified class identifier (CLSID). Полное описание ...
public static Type GetTypeFromCLSID(Guid clsid, bool throwOnError);
Gets the type associated with the specified class identifier (CLSID), specifying whether to throw an exception if an error occurs while loading the type. Полное описание ...
public static Type GetTypeFromCLSID(Guid clsid, string server);
Gets the type associated with the specified class identifier (CLSID) from the specified server. Полное описание ...
public static Type GetTypeFromCLSID(Guid clsid, string server, bool throwOnError);
Gets the type associated with the specified class identifier (CLSID) from the specified server, specifying whether to throw an exception if an error occurs while loading the type. Полное описание ...
public static Type GetTypeFromHandle(RuntimeTypeHandle handle);
Gets the type referenced by the specified type handle. Полное описание ...
public static Type GetTypeFromProgID(string progID);
Gets the type associated with the specified program identifier (ProgID), returning null if an error is encountered while loading the System.Type. Полное описание ...
public static Type GetTypeFromProgID(string progID, bool throwOnError);
Gets the type associated with the specified program identifier (ProgID), specifying whether to throw an exception if an error occurs while loading the type. Полное описание ...
public static Type GetTypeFromProgID(string progID, string server);
Gets the type associated with the specified program identifier (progID) from the specified server, returning null if an error is encountered while loading the type. Полное описание ...
public static Type GetTypeFromProgID(string progID, string server, bool throwOnError);
Gets the type associated with the specified program identifier (progID) from the specified server, specifying whether to throw an exception if an error occurs while loading the type. Полное описание ...
public static RuntimeTypeHandle GetTypeHandle(object o);
Gets the handle for the System.Type of a specified object. Полное описание ...
protected abstract bool HasElementTypeImpl();
When overridden in a derived class, implements the System.Type.HasElementType property and determines whether the current System.Type encompasses or refers to another type; that is, whether the current System.Type is an array, a pointer, or is passed by reference. Полное описание ...
public object InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args);
Invokes the specified member, using the specified binding constraints and matching the specified argument list. Полное описание ...
public object InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, CultureInfo culture);
Invokes the specified member, using the specified binding constraints and matching the specified argument list and culture. Полное описание ...
public abstract object InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] namedParameters);
When overridden in a derived class, invokes the specified member, using the specified binding constraints and matching the specified argument list, modifiers and culture. Полное описание ...
protected abstract bool IsArrayImpl();
When overridden in a derived class, implements the System.Type.IsArray property and determines whether the System.Type is an array. Полное описание ...
public virtual bool IsAssignableFrom(Type c);
Determines whether an instance of a specified type can be assigned to the current type instance. Полное описание ...
protected abstract bool IsByRefImpl();
When overridden in a derived class, implements the System.Type.IsByRef property and determines whether the System.Type is passed by reference. Полное описание ...
protected abstract bool IsCOMObjectImpl();
When overridden in a derived class, implements the System.Type.IsCOMObject property and determines whether the System.Type is a COM object. Полное описание ...
protected virtual bool IsContextfulImpl();
Implements the System.Type.IsContextful property and determines whether the System.Type can be hosted in a context. Полное описание ...
public virtual bool IsEnumDefined(object value);
Returns a value that indicates whether the specified value exists in the current enumeration type. Полное описание ...
public virtual bool IsEquivalentTo(Type other);
Determines whether two COM types have the same identity and are eligible for type equivalence. Полное описание ...
public virtual bool IsInstanceOfType(object o);
Determines whether the specified object is an instance of the current System.Type. Полное описание ...
protected virtual bool IsMarshalByRefImpl();
Implements the System.Type.IsMarshalByRef property and determines whether the System.Type is marshaled by reference. Полное описание ...
protected abstract bool IsPointerImpl();
When overridden in a derived class, implements the System.Type.IsPointer property and determines whether the System.Type is a pointer. Полное описание ...
protected abstract bool IsPrimitiveImpl();
When overridden in a derived class, implements the System.Type.IsPrimitive property and determines whether the System.Type is one of the primitive types. Полное описание ...
public virtual bool IsSubclassOf(Type c);
Determines whether the current System.Type derives from the specified System.Type. Полное описание ...
protected virtual bool IsValueTypeImpl();
Implements the System.Type.IsValueType property and determines whether the System.Type is a value type; that is, not a class or an interface. Полное описание ...
public virtual Type MakeArrayType();
Returns a System.Type object representing a one-dimensional array of the current type, with a lower bound of zero. Полное описание ...
public virtual Type MakeArrayType(int rank);
Returns a System.Type object representing an array of the current type, with the specified number of dimensions. Полное описание ...
public virtual Type MakeByRefType();
Returns a System.Type object that represents the current type when passed as a ref parameter (ByRef parameter in Visual Basic). Полное описание ...
public virtual Type MakeGenericType(params Type[] typeArguments);
Substitutes the elements of an array of types for the type parameters of the current generic type definition and returns a System.Type object representing the resulting constructed type. Полное описание ...
public virtual Type MakePointerType();
Returns a System.Type object that represents a pointer to the current type. Полное описание ...
public static Type ReflectionOnlyGetType(string typeName, bool throwIfNotFound, bool ignoreCase);
Gets the System.Type with the specified name, specifying whether to perform a case-sensitive search and whether to throw an exception if the type is not found. The type is loaded for reflection only, not for execution. Полное описание ...
public override string ToString();
Returns a String representing the name of the current Type. Полное описание ...
 
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New app for learning C#
Creating a new console application to learn C#
Debugging Code
Debug.Assert(false) Debugging Code in C#
For debugging, option "Common Language Runtime Exceptions" see exceptions when a program is running C#
Attribute [Obsolete("My method is outdated. Do not use", false)] Warning when compiling code in the C#
Data Types C#
C# data types: number (bool, char, byte, int, long, float, double, decimal), text (string), enumeration (enum), class (class), structure (struct)
Structure Boolean in the C# it is a flag with values true or false (bool) and methods for conversion bool
Structure Int32 in the C# it is a signed integer (int) and methods for conversion int
Structure Single in the C# this is a floating-point number (float) and methods for conversion float
var ... Variable of any type in the C#. Example: var str = "Hello!";
Type dynamic in the C#
Default values in the C#
Storing objects in memory. Removing Objects from Memory
Reference types and value types in the C#
Stack (stack) - memory for method parameters and local variables in the C#
Heap - dynamic memory available at run time in the C#
Interface IDisposable. Write code to properly release unmanaged resources in the destructor and in the interface IDisposable in the C#
Memory. Garbage collector (garbage collector). Automatic memory freeing in the C#
C# type conversion
C# converting a string to a number (string → short, int, long, ushort, uint, ulong, float, double, decimal) | Use Culture (system settings)
C# converting a number to a string (int, double, short, ... → string) with the required accuracy
Text in C# (type string and class String)
Algorithm for intersecting rectangles
What is text in the C# ? Type string and class String. Methods for working with text.
Length (string length in C#). Example: string str1 = "Hello"; int v1 = str1.Length;
CompareTo (compares case-sensitive text in C#). Example: bool bIsSame = str1.CompareTo(str2)==0;
ToLower (converts text to lowercase in C#). Example: string str1 = "HELLO World!"; string str2 = str1.ToLower();
ToUpper (converts text to uppercase in C#). Example: string str1 = "Hello World!"; string str2 = str1.ToUpper();
Split (split the string into words in C#). Example: string[] arrWords = strText.Split(" ");
StartsWith (checks the beginning of the text with the specified case-sensitive text in C#). Example: bool bStart = str1.StartsWith(str2);
Contains (checks whether the text specified is case-sensitive or not in case-sensitive C#). Example: bool bFound = str1.Contains(str2);
IndexOf (searches for a case-sensitive string and returns the position in C#). Example: int pos = str1.IndexOf(str2);
Substring (returns part of the text from the specified position and length in the C#). Example: string str1 = "Hello World!"; string str2 = str1.Substring(2, 5);
IsNullOrEmpty (checks the text for blank or for null in the C#). Example: string name = "Hello World!"; bool bFlag = String.IsNullOrEmpty(name);
IsNullOrWhiteSpace (validates text on null or on text with spaces in the C#). Example: string name = "   "; bool bFlag = String.IsNullOrWhiteSpace(name);
[] (returns a character from the specified position in the C#). Example: char symbol = str[1];
Format (text formatting, strings in the C#). Example: string strNew = String.Format("Hello {0}, {1}", name, year);
+ (add lines and text in the C#). Example: string str = str1 + str2 + " people!";
$ (string interpolation in the C#). Example: string result = $"Hello {a} + {b} = {a + b}";
Symbol @ before the beginning of the line in the C#. Example: string str1 = @"aaa";
Use @ and $ together (C# string interpolation)
DateTime in C#
What is DateTime in C# ? Convert to a string with the format
Enumerations in C # (enum)
What is enumeration? (enum) in the C# ?
How to convert text to enum in C#
How to enumerate all elements in enum in C#
null
null value for simple types. Use ? or Nullable in the C#
Operator ?? (null-union) in the C#
try-catch
Exception handling in C#. Operator try catch finally
Classes in C# (class)
What is a class? in the C#?
Class Access Modifiers in the C#. Access modifiers for methods, properties, fields in the C#
"partial class" in the C#. Description of the class in different files
[bgcolor=#F5F9DB]Constructors for a class[/bgcolor]
Class Constructor in the C#
Initializing a Class Object (set values for fields) in the C#
To call the constructor at the base class in the C#
Static constructor in class C#
"base" To call a method from the base class. To call a variable from the base class. To call the constructor from the base class. C#
"this" To set or get a value from a class field. To call the constructor from the class. C#
[bgcolor=#F5F9DB]Class Destructors[/bgcolor]
Class Destructor in the C#
Destructors in classrooms (how basic destructors are called) C#
[bgcolor=#F5F9DB]Inheritance[/bgcolor]
What is class inheritance in C# ?
[bgcolor=#F5F9DB]Inheritance using new[/bgcolor]
Use new for the interface method. Inheriting an interface from an interface with the same method
Use new for the class method. Inheriting a class from a class in C#.
[bgcolor=#F5F9DB]Inheritance using sealed[/bgcolor]
sealed class. Prohibition to inherit in the C#
Inheriting a class from a class in C#. We use words virtual, override, sealed for class methods
[bgcolor=#F5F9DB]Abstract class[/bgcolor]
What is an abstract class? in the C# ? Abstract methods, properties, indexes.
Inheritance from a class abstract in the C#. Use abstract and override for class methods
[bgcolor=#F5F9DB]Constants and readonly [E_M_P_T_Y] fields in the classroom[/bgcolor]
Constants in the classroom C#
readonly . For a class field. This field is read-only in C#
[bgcolor=#F5F9DB]Properties get and set in the classroom C# (accessors)[/bgcolor]
get set Properties in a class C#
Inheritance (virtual, override) for get and set accessors in C#
[bgcolor=#F5F9DB]Operators, indexers in C#[/bgcolor]
Operators in a C# class. Operator overload: > < ++ + true false
Indexers in Class C#
[bgcolor=#F5F9DB]Nested types in C#[/bgcolor]
Nested class, structure in C#
[bgcolor=#F5F9DB]Parameters in the C#[/bgcolor] class method
ref and out (return parameters by reference in the C# method). Example: public void AddValue(ref int value)
Default parameters (optional parameters) in a C# method. Example: public int CalculateSum(int a, int b, int c=7)
C# named parameters. Example: public void CalculateSum(a:7, b:3);
[bgcolor=#F5F9DB]Generic methods, generic classes in C# (templates)[/bgcolor]
A method with generic parameters in C# (templates). Example: public double Sum<T1, T2>(T1 value1, T2 value2) { ... }
A generic (typed) class in C# (templates). Example of a class Book<T> { ... }
where Type constraint in a generic (typed) class in C# (templates). Example of class Dog<T> where T : Cat
[bgcolor=#F5F9DB]Converting a class object from one type to another[/bgcolor]
explicit is an explicit conversion operator in the C class#
implicit is an implicit conversion operator in class C#
Converting a class object from one type to another in C#. Use try( ) is as
Converting a class object from one type to another in C#. Using pattern matching is switch
[bgcolor=#F5F9DB]Class object in C#[/bgcolor]
? conditional null operator in C#
The class object contains a reference in C#
How do you copy objects in C# to copy class data instead of a reference?
[bgcolor=#F5F9DB]Static constructor and static properties and methods[/bgcolor]
Static constructor in class C#
Static methods, properties, members in class C#
[bgcolor=#F5F9DB]Additional class features in C#[/bgcolor]
The extension method in C# (this in the first parameter of the method). Example: static public void AddValues(this List<int> myList, int value1, int value2)
[bgcolor=#F5F9DB]Class naming conventions in C#[/bgcolor]
What letters, lowercase or uppercase, to call classes, methods, properties... in C#
Is it correct to create a separate .cs file for each class in C#? Or write C# classes in a single .cs file?
Static Class
Static Class in C#
Anonymous Class
An object with an anonymous (missing) type in C#. Example: var book = new { BookName = "Lord of the Rings", Price = 100 };
Interfaces
What is interface in C#?
Inheriting the interface from the interface in C#
Inheriting a class from an interface class in C#. Using override and virtual for class methods
Generalized (typed) interface in C# (templates). Example interface IUser<T> { ... }
Struct structure
What is a structure in C#?
Structure access modifiers in C#. Access Modifiers for Methods, Properties, Struct Fields in C#
Initializing a Structure Object (Setting Values for Fields) in C#
How to change the value in an array of structures or in a collection of structures (List) in C#
Nested structure in C#
[bgcolor=#F5F9DB]Converting a struct object from one type to another[/bgcolor]
implicit is an implicit struct-to-C conversion operator#
explicit is an explicit struct-to-C conversion operator#
Lazy class loading in C#
Lazy Object Creation in Memory (class Lazy in C#)
Tuples
Tuples in C#
Dynamic objects with any properties
DynamicObject and ExpandoObject in C#
Arrays
What are arrays? array in C#
Initializing an Array (Populating the Array Elements) in C#
params passing any number of parameters to a method in C#
Array class C#
Collection
What are collections in C#?
What are non-generic collections in C#? ArrayList, Stack, Queue, Hashtable, SortedList, BitArray classes
What are generic (typed) collections in C#? The classes are List<T>, SortedList<T>, Stack<T>, Dictionary<TKey, TValue>, LinkedList<T>, Queue<T>, HashSet<T>, SortedSet<T>, ConcurrentDictionary<TKey, TValue>, SortedDictionary<TKey, TValue>
Non-generic collection classes (different types of items are stored in the same collection)
IEnumerable interface. The most basic interface for collections in C#
Interfaces: ICollection, IList, IDictionary. The basis for collections in C#
ArrayList class (collection in C#)
What is ArrayList in C#?
SortedList class (collection in C#)
What is SortedList in C#?
Stack class (collection in C#)
What is Stack in C# ?
Queue class (collection in C#)
What is Queue in C# ?
Hashtable class (collection in C#)
What is a Hashtable in C# ?
BitArray class (collection in C#)
What is BitArray in C#?
Generic, typed collection classes in C# (elements of the same type are stored in the same collection)
IEnumerable interface<T>. The most basic interface for typed collections in C#
Interfaces: ICollection<T>, IList<T>, ISet<T>, IDictionary<TKey, TValue>. Basis for typed collections in C#
List class<T> (typed collection in C#)
What is List<T> in C#?
Initializing the Collection List in curly brackets in the C#
for, foreach (go through all the items in the List<T>) in C#
Find (looking for an item by criterion in the List<T>) in C#
FindAll (looking for a list of items by criterion in the List<T>) in C#
ForEach (for each List element an<T> action is performed) in C#
LinkedList class<T> (typed collection in C#)
What is LinkedList<T> in C# ?
SortedList<TKey, TValue> class (typed collection in C#)
What is SortedList<TKey, TValue> in C# ?
Stack class<T> (typed collection in C#)
What is Stack<T> in C# ?
Queue class<T> (typed collection in C#)
What is Queue<T> in C# ?
HashSet class<T> (typed collection in C#)
What is a HashSet<T> in C# ?
How HashSet works<T> in C#
SortedSet class<T> (typed collection in C#)
What is a SortedSet<T> in C#?
ObservableCollection class<T> (typed collection in C#)
What is ObservableCollection<T> in C#?
Dictionary<TKey, TValue> class (typed collection in C#)
What is Dictionary<TKey, TValue> in C# ?
Initializing Elements in the Dictionary<TKey, TValue> Constructor in C#
How Dictionary<TKey, TValue> works in C#
How to convert IEnumerable to → Dictionary in C#<TKey, TValue> . Using the ToDictionary method
SortedDictionary<TKey, TValue> class (typed collection in C#)
What is SortedDictionary<TKey, TValue> in C# ?
ConcurrentDictionary<TKey, TValue> class (typed collection in C#)
What is ConcurrentDictionary<TKey, TValue> in C# ?
AddOrUpdate (add or update a value by key in ConcurrentDictionary<TKey, TValue>) in C#
Asymptotic complexity for adding, removing, taking an item in collections
Asymptotic complexity for adding, removing, taking an element in collections C# (List, SortedList, Stack, Dictionary, LinkedList, Queue, HashSet, SortedSet, ConcurrentDictionary, SortedDictionary)
Sorting Elements in the [] Array and List <T>Collection
Sorting elements in the [] array and List collection<T> in C#. IComparable interface
Sorting elements in the [] array and List collection<T> in C#. IComparer interface
My implementation of IEnumerator, IEnumerable, and iterators
Example: My implementation of the IEnumerable and IEnumerator interfaces in C#
Iterators and yield in C#. Examples of IEnumerable implementation with yield
Extension Methods for IEnumerable<T> (Search, Replace, Value Sampling) in C#
Methods for finding, replacing, and fetching values in IEnumerable<T>. Extension methods for IEnumerable<T> in C#
Any (IEnumerable extension method<T>) in C#
Select (IEnumerable extension method<T>) in C#
GroupBy (extension method IEnumerable<T>) in the C#
GroupJoin (extension method IEnumerable<T>) in the C#
Sorting, filtering in LINQ (Language-Integrated Query)
What is LINQ in C#?
Sorting, filtering list items using LINQ in C#
Books for learning LINQ in C#
Pointers
Pointers in C#. Operator unsafe
Pointers to structs, class fields, arrays in C#. Operators unsafe, stackalloc, fixed
Working with files
Open the file, read the text from the file and break it down by words. C#
Create a text file, write the text to a C file#
Create an HTML file, write tabular data in an HTML file | C#
Create a binary file, write bytes to file C#
Partial upload of a file from FTP to C#
Class Path. Combine method - merges the strings into the full path of the file. And other methods of the Path class | C#
Serialization
What is object serialization in C#? [Serializable] attribute
Serializing a C# object into a binary file. BinaryFormatter class. [Serializable] attribute
Serializing a C# object into an XML file. XmlSerializer class. [Serializable] attribute
Serialization of a C# object into a JSON file. DataContractJsonSerializer class. [Serializable] attribute
Serializing a C# object into a SOAP file. SoapFormatter class. [Serializable] attribute
Namespaces
Namespace using in C#
Delegate
Delegate in C#
Add method(s) in a C# delegate. Unification of delegates. Removing a Method from a Delegate
Delegate as a parameter in method C#
Unnamed, anonymous method in C# (method described in place of parameter, delegate)
Universal Delegates
Generic, generic delegates in C# (templates)
Action, Predicate, and Func Universal Delegates in C#
Events
Events in C#
Lyamda
Lamda (example) in C#
Regular expressions
Regular Expressions in C#
Breaking the text into words (regular expressions in c#)
Put * instead of the last name after the first letter (regular expressions in c#)
Breaking the text into words (regular expressions in c#)
Process, process modules
Process in C# (Process class)
Process modules in C# (ProcessModule class)
Threads, multithreading
Threads in C# (Thread class)
Thread Pool in C#
What"s the difference between background and foreground in C#?
Synchronizing Threads in C#
Parallel Library Task (TPL)
Parallel Library Task (TPL). Parallel Task Library in C#
The Parallel class uses the Invoke method to execute the for and foreach (on different CPU cores) methods in parallel in C#
PLINQ parallelizes LINQ queries to run on different processor cores in C#
Asynchronous methods (async and await)
class Task in C#
Asynchronous programming in C# (async, await how to formalize)
Asynchronous programming in C# (using async, await, and Task as an example)
Asynchronous Programming in C# (Theory)
Application domains
What are Application Domains in C# ? (AppDomain class)
Example "Application domain information" (current domain name, list assemblies) in C#
Example "Let"s create the 2nd application domain. Write the class in the 1st domain and use it in the 2nd domain. MarshalByRefObject in C#
Example "Load the 2nd domain of the application from a file, run the calculations, unload the 2nd domain from memory" to C#
Attributes
Attributes for Class, Method, Property in C#
Attribute [Conditional("AAA")] . For compilation, ignore a method or property unless a conditional compilation symbol is defined in C#
Attribute [Obsolete("My method is outdated. Do not use", false)] Warning when compiling code in the C#
The [Display(Name="Sleep at night")] attribute. To store some text attached to a variable | C#
The attribute [Required(ErrorMessage = "Please enter a name")] is described for a property in the C# class and requires the property to be populated if the ErrorMessage error in the MVC ASP.NET is not filled in the screen
The attribute [Remote("IsValidAuthor", "Home", ErrorMessage = "Enter correct author of book")] is described for a property in a C# class and checks that property for correctness on the server via the IsValidAuthor method in conroller Home, if the method returns false, then there will be an ErrorMessage error on the screen in the MVC ASP.NET
Reflection in C#
Nameof operator in C# (class name, method name, variable name)
What is reflection in C#? Type Class
Creating a class object and calling the constructor with parameters using reflection in C#
How to get attribute information for a method from a class. Using reflection | C#
How to get attribute information for a property of a class. Using reflection | C#
How to change the set property in a class if private using reflection | C#
Preprocessor directives (if on compilation)
#define #undef #if #elif #else #endif preprocessor directives in C#
How do I define #define for all files (for the entire project) in C#?
What is the CLR assembly and runtime?
Assembly (Assembly) in C#. Compilation. Intermediate code IL (Intermediate Language). Metadata.
How to include a C# assembly in a project?
Utility ildasm.exe. Converts an assembly (C# exe, dll file) to an intermediate language (IL). This utility is easy to learn
The runtime CLR (Common Language Runtime) in C# . JIT (Just-In-Time) compiler.
Creating and connecting our build
Creating our C# build (regular build)
Connecting our C# build (regular build)
Creating our C# assembly (split assembly)
Connecting our C# assembly (split assembly)
Database in Console Application C#
Entity Framework in a C# console application. Using Code First (we write c# code, and the tables in the database are created by ourselves)
Read the image from the database and save it to a file | ADO.NET, C#, console application
DI Dependency Injection in C#
Dependency injection in C# | Dependency Injection (DI)
Ninject (IoC container) dependency management in C#
Autofac (IoC container) dependency management in C#
Convenient Visual Studio utilities
View Class Diagram in C#
exe to C# code
"dotPeek" application for decompile (disassemble) exe to c# source code
In a C# application, call the C++ functions
What are managed code (managed code) and unmanaged code (unmanaged code)? | C# and C++
Marshaling (marshalling) in C#. Type Conversion Between Managed Code (managed code) and Unmanaged Code (unmanaged code)
In the application C# we call functions from Windows dll (C++ WinAPI). Attribute [DllImport("user32.dll")]
In a C# application, call functions from my dll (C++). Attribute [DllImport("My.dll", CallingConvention = CallingConvention.Cdecl)]
Additional topics, questions
You don"t create a new project in Visual Studio 2019. Object reference not set to instance of an object"
C# compilation error: error CS1106: Extension method must be defined in a non-generic static class
C# compilation error: error CS0246: The type or namespace name "Point" could not be found (are you missing a using directive or an assembly reference?)
Why can"t the Dictionary.TryGetValue method find a value by key in C#?
Object-oriented programming (OOP). OOP Principles: Abstraction, Encapsulation, Inheritance, Polymorphism
What letters in C# (uppercase or lowercase or uppercase) should we use to name fields, methods in a class, interfaces, delegates, parameters?
Is it correct to create a separate .cs file for each class in C#? Or write C# classes in a single .cs file?
Is it better to use a built-in int type or an Integer class (string type or String class) in C#?
How do I download and install the version of the .NET Framework I want in Visual Studio?
Boxing and unboxing meaningful types in C#
Error CS8107 Feature "default literal" is not available in C# 7.0. Please use language version 7.1 or greater
Error "unable to connect to web server "iis express" | C# | Visual Studio 2017
Uninstall and install NuGet in Visual Studio
When opening a project in Visual Studio 2019 error: "project requires "SQL Server 2012 Express LocalDB" which is not installed on this computer"
The checked and unchecked math operators
The unchecked math operator in C#
The checked math operator in C#
Additional C# classes
C# Random class
C# Structure Point
C# PointF structure
C# Size structure
C# SizeF structure
C# Rectangle Structure
C# RectangleF structure
It"s time
The amount of time that has elapsed since the system booted (in milliseconds). System.Environment.TickCount in C#
Encryption
Let"s encrypt the password and check it | C# console application
Excell
Reading an excel file in C# (console application)
WWW Sites to Learn C#
Websites to learn C#

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