WPF

[ValueConversion(typeof(byte[]), typeof(ImageSource))]
   public class ByteArrayToImageSource : IValueConverter
   {
       #region Implementation of IValueConverter

       public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
       {
           var byteArrayImage = value as byte[];

           if (byteArrayImage != null && byteArrayImage.Length > 0)
           {
               var ms = new MemoryStream(byteArrayImage);

               var bitmapImg = new BitmapImage();

               bitmapImg.BeginInit();
               bitmapImg.StreamSource = ms;
               bitmapImg.EndInit();

               return bitmapImg;
           }

           return null;
       }

       public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
       {
           return null;
       }

       #endregion
   }

<DataTemplate DataType="{x:Type vm:HomeViewModel}">
    <vw:HomeView/>
</DataTemplate>

<DataTemplate DataType="{x:Type vm:ClientViewModel}">
    <vw:ClientView/>
</DataTemplate>

public event RoutedEventHandler CustomClick;
       private void btn_Click(object sender, RoutedEventArgs e)
       {
           if (CustomClick != null)
               CustomClick(this, new RoutedEventArgs());
       }

<controls:Button CustomClick="btn1_CustomClick"  ButtonText="Click Here"  Name="btn1" Margin="61,105,93,128"></controls:Button>

private void btn1_CustomClick(object sender, RoutedEventArgs e)
       {
           MessageBox.Show("Custom control CLicked");
       }