Multiple abstract form inheritance

Question

I have an abstract base control BaseControl for which I resolved the non-display of the child forms using the following post .

Now, I have a lot of controls sharing some common properties for which I want to create an intermediate abstract class to regroup the different common properties and force all descendants to implement some other properties.

[TypeDescriptionProvider(typeof(AbstractControlDescriptionProvider<BaseControl, UserControl>))]
public abstract partial class BaseControl : UserControl {
  ...
  ...
  ...
}
 [TypeDescriptionProvider(typeof(AbstractControlDescriptionProvider<BaseControl2, BaseControl>))]
public abstract partial class BaseControl2 : BaseControl {
  ...
  ...
  ...
}

Unfortunately, this doesn't work, the designer complains about not being able to create an instance of abstract class BaseControl2 for my descendant controls.

Any suggestion of how to resolve this?

Answer 1

You need to realize how the AbstractControlDescriptionProvider works - if the type is abstract, it replaces it with the non-abstract base type.

You specified an abstract type as the non-abstract base type, so obviously it can't work :)