using System;

​

public class TTest1 {

    public static void Test() {

        Console.WriteLine("TTest1.Test");

    }

}

​

public class TTest2: TTest1 {

    public static void Test() {

        Console.WriteLine("TTest2.Test");

    }

}

​

public class TTest<T> where T: TTest1, new() {

    T FTest;

    public static void TestIt() {

        FTest = new T();

        FTest.Test();

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}