using System;

public class Program

{

    public static void Main()

    {

        IOutput output = new ConsoleOutput();

        output.PrintMessage("Test PrintMessage 1");

        output.PrintException(new InvalidOperationException("Testexception 1"));

        IOutput output2 = new ConsoleOutput2();

        output2.PrintMessage("Test PrintMessage 2");

        output2.PrintException(new InvalidOperationException("This"));

    }

}

​

interface IOutput

{

    void PrintMessage(string message);

    void PrintException(Exception exception)

        => PrintMessage($"Exception: {exception}");

}

class ConsoleOutput : IOutput

{

    public void PrintMessage(string message)

        => Console.WriteLine(message);

}

​

class ConsoleOutput2 : IOutput

{

    public void PrintMessage(string message)

        => Console.WriteLine(message);

    public void PrintException(Exception exception)

        => Console.WriteLine("ÖH! Någe gick fel här'rö.");

}