C#
Creating a new C# console application... and write the code
using System;
using System.Reflection;
namespace ConsoleApplication1
{
class Book
{
public int Price { get; private set; }
}
class Program
{
Book book1 = new Book();
typeof(Book).GetProperty("Price").SetMethod.Invoke(book1, new object[] { 75 });
// book1.Price = 75
}
}