using System;

public class Program

{

    public static void Main()

    {

        var msgProcessor = new RRMessageProcessor();

        var b = msgProcessor.CanProcess(new RRMessage());

        Console.WriteLine(b ? "Yes" : "No");

    }

}

​

public interface IBaseMessage

{

}

​

public interface IMessageProcessor<T> where T : IBaseMessage

{

    void Process(T msg);

}

​

public class RRMessage : IBaseMessage

{

}

​

public class BaseMessageProcessor

{

    public bool CanProcess<T>(T msg) where T : IBaseMessage

    {

        return this is IMessageProcessor<T>;

    }

}

​

public class RRMessageProcessor : BaseMessageProcessor, IMessageProcessor<RRMessage>

{

    public void Process(RRMessage msg)

    {

    }

}

​