using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(typeof(Bar).IsInstanceOfType(typeof(Foo)));   

        Console.WriteLine(typeof(Foo).IsInstanceOfType(typeof(Bar)));   

        Console.WriteLine(typeof(Bar).IsInstanceOfType(new Foo())); 

        Console.WriteLine(typeof(Foo).IsInstanceOfType(new Bar())); 

        Console.WriteLine(typeof(Bar).IsAssignableFrom(typeof(Foo)));   

        Console.WriteLine(typeof(Foo).IsAssignableFrom(typeof(Bar)));   

    }

}

​

public class Bar

{

}

​

public class Foo : Bar

{

}