public abstract class ImageProvider<T> : VideoReceiver, 
	IImageProvider<T>
where T : class

Public MustInherit Class ImageProvider(Of T As Class)
	Inherits VideoReceiver
	Implements IImageProvider(Of T)

generic<typename T>
where T : ref class
public ref class ImageProvider abstract : public VideoReceiver, 
	IImageProvider<T>

[<AbstractClassAttribute>]
type ImageProvider<'T when 'T : not struct> =  
    class
        inherit VideoReceiver
        interface IImageProvider<'T>
    end