using System;

public class Program

{

    public static void Main()

    {

        var a = new Type();

        Console.WriteLine(a is IType<ISubType>);

    }

}

​

public class Type : IType<SubType>

{

}

public interface IType<T>

{

}

public class SubType : ISubType

{

}

public interface ISubType

{

}