Date picker widget: Define the view of the designer
To define the date picker control designer view, perform the following:
    - In the context menu of the Designer » Views folder, click Add » New Item...
 
    - In the left pane, select Visual C# Items » Code.
 
    - Click Class and in the Name input field, enter DatePickerDesignerView.cs
 
    - Change the class definition to inherit from 
ContentViewDesignerView. 
    - Save the file.
 
 GITHUB EXAMPLE: For more information about the content of the file, see the DatePickerDesignerView.cs file of the downloaded sample project.
When you create a designer view for a multi view designer, you must inherit from ContentViewDesignerView.
After you define the designer view, you must create the visuals of the view.