<Window x:Class="WpfAppImage.MainWindow"
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
          xmlns:local="clr-namespace:WpfAppImage"
          mc:Ignorable="d"
          Title="MainWindow" Height="450" Width="800">
     <Grid>

          <Image Source="{Binding myImg}"/>

     </Grid>
</Window>

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace WpfAppImage
{
     public partial class MainWindow : Window
     {
          public ImageSource myImg { get; set; }
          public MainWindow()
          {
               InitializeComponent();

               // for binding
               this.DataContext = this;
              
               // set image using binding
               myImg = new BitmapImage(new Uri("d://1.png", UriKind.Absolute));
          }

     }
}