C#

class Foo : ICloneable
{
  public int bar;
  public SomeClass baz;
  
  public Foo()
  {
    bar = 0;
    baz = new SomeClass();
  }
  
  public Foo(Foo sourceCopy)
  {
    bar = sourceCopy.bar;
    baz = sourceCopy.baz; // <- be careful see Clone method
  }
  
  public Foo Clone()
  {
    Foo f = new Foo();
    f.bar = bar;
    f.baz = new SomeClass();
    // Perform operations on f.baz
    // so that its state is the same as
    // this.baz
  
    return f;
  }

  object ICloneable.Clone()
  {
     return Clone(); // Call the strongly-typed
     // Clone method
  }
}

interface IBar
{
  object Bar();
}
 
class Foo : IBar
{
  ....
  
  public object Bar()
  {
     ....
  }
}

class Baz : IBar
{
  ...
 
  object IBar.Bar()
  {
    ....
  }
}

using System;
using WinSystem=System;

namespace Test.System { 

	public class Test {
		public static void Main(String[] args) { 
			WinSystem.Console.WriteLine("Hello World");
		}
	}
}