How to do it...

Let's perform the following steps to create a few elements inside a window and provide the option to drag and drop from one panel to the other:

1. First, open MainWindow.xaml and replace the existing Grid with a StackPanel. Set its Orientation property to Horizontal.
2. Add two WrapPanel inside it and set their Width, Margin, ItemHeight, and ItemWidth properties.
3. Give a name to both panels. Let's name the first wrap panel sourcePanel and the second wrap panel targetPanel. We will be using these name later from the code, while accessing them.
4. Add a few labels to the first wrap panel. Set their Content, Background, and other text formatting properties. Here's the complete markup code:

<StackPanel Orientation="Horizontal"> 
    <WrapPanel x:Name="sourcePanel" 
               ItemHeight="60" ItemWidth="100" 
               Width="200" Margin="4" 
               Background="LightGoldenrodYellow...