using System;

public interface IMyInterface1 : IDisposable
{
    void DoSomething();
}

public interface IMyInterface2 : IDisposable
{
    void DoSomethingElse();
}

public class MyClass : IMyInterface1, IMyInterface2
{
    public void DoSomething() { Console.WriteLine("I'm doing something..."); }
    public void DoSomethingElse() { Console.WriteLine("I'm doing something else..."); }
    public void Dispose() { Console.WriteLine("Bye bye!"); }
}

class Program
{
    public static void Main(string[] args)
    {
        using (IMyInterface1 myInterface = new MyClass())
        {
            myInterface.DoSomething();
        }
    }
}