The designer must create an instance of…cannot because the type is declared abstract

Question

Visual Studio complains: Warning 1 The designer must create an instance of type \'RentalEase.CustomBindingNavForm\' but it cannot because the type is declared as abst

Answer 1

This worked for me with an abstract class inheriting a UserControl

public class AbstractCommunicatorProvider : TypeDescriptionProvider
{
    public AbstractCommunicatorProvider(): base(TypeDescriptor.GetProvider(typeof(UserControl)))
    {
    }
    public override Type GetReflectionType(Type objectType, object instance)
    {
        return typeof(UserControl);
    }
    public override object CreateInstance(IServiceProvider provider, Type objectType, Type[] argTypes, object[] args)
    {
        objectType = typeof(UserControl);
        return base.CreateInstance(provider, objectType, argTypes, args);
    }
}


[TypeDescriptionProvider(typeof(AbstractCommunicatorProvider))]
public abstract partial class SelectorBase : UserControl
{

///class contents 
}

I didn't need to add this to all derived classes but in your situation you may need to.