How can a WPF UserControl inherit a WPF UserControl?

Question

The following WPF UserControl called DataTypeWholeNumber which works.

Now I want to make a UserControl called DataTypeDateTime and

Answer 1

Ensure that you have changed the first tag in the xaml to also inherit from your new basetype

So

becomes

---

So, to summarise the complete answer including the extra details from the comments below:

• The base class should not include a xaml file. Define it in a single (non-partial) cs file and define it to inherit directly from Usercontrol.
• Ensure that the subclass inherits from the base class both in the cs code-behind file and in the first tag of the xaml (as shown above).