using System;

public class Program

{

    public static void Main()

    {

        var rozhraniPole = new ITest[] 

        { 

            new TestImplementation(),

            new SecondImplementation()

        };

        ITest interfaceTest = new TestImplementation();

        interfaceTest.MyMethod();

        DoStuff(interfaceTest);

        Console.WriteLine("Volam ruzne implementace podle rozhrani:");

        foreach (var rozhrani in rozhraniPole) 

        {

            DoStuff(rozhrani);

        }

    }

    // Je to static protože je to v mainu

    public static void DoStuff(ITest worker) 

    {

        worker.MyMethod();

    }   

}

​

public class TestImplementation : ITest 

{

   public void MyMethod() {

       Console.WriteLine("Hi");

   }

   public void MyPublicMethod() {

       Console.WriteLine("Hi");

   }

}

​

public class SecondImplementation : ITest 

{

   public void MyMethod() {

       Console.WriteLine("Hah, jsem druhý");

   }

}

​

public interface ITest 

{

   void MyMethod();

}