using System;

​

public class M

{

    void Print() => Console.WriteLine("Here");

}

​

public class Something<T>

{

​

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

    public void DoStuff<T>(string s) where T : Something<M>, new()

    {

        // serialize s into object M 

        // call something on 

    }

}