using System;

public class Program

{

    public static void Main()

    {

        var v1 = new V1();

        var v2 = new V2();

​

        Method(v1);

        Method(v2);

    }

    public static void Method(V1 v1)

    {

        Console.WriteLine("Call v1");

    }

​

    public static void Method(V2 v2)

    {

        Console.WriteLine("Call v2");

    }

    public class V1

    {

        public string Version { get; set; }

    }

​

    public class V2 : V1

    {

    }

}