public interface ISequenceWriter<T, TBuf> : IObserver<T>
where T : class, Object, IDisplayableBuffer<TBuf>
where TBuf : struct, new()

generic<typename T, typename TBuf>
where T : ref class, Object, IDisplayableBuffer<TBuf>
where TBuf : value class, gcnew()
public interface class ISequenceWriter : IObserver<T>