Interface member hiding : Explicit Interface Implementation « Class « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Class
3. Explicit Interface Implementation

using System;


public interface InterfaceA
{
  void MethodA();
}


public interface InterfaceB : InterfaceA
{
  new void MethodA();  // hides MethodA() in InterfaceA
}

public class MyClass : InterfaceB
{

  void InterfaceB.MethodA()
  {
    Console.WriteLine("InterfaceB implementation of MethodA()");
  }

  public void MethodA()
  {
    Console.WriteLine("InterfaceA implementation of MethodA()");
  }

}


class MainClass
{
  public static void Main()
  {
    MyClass myClass = new MyClass();

    Console.WriteLine("Calling myClass.MethodA()");
    myClass.MethodA();

    InterfaceB mySteerable = myClass as InterfaceB;
    Console.WriteLine("Calling mySteerable.MethodA()");
    mySteerable.MethodA();

    InterfaceA myDrivable = myClass as InterfaceA;
    Console.WriteLine("Calling myDrivable.MethodA()");
    myDrivable.MethodA();

  }

}

Calling myClass.MethodA()
InterfaceA implementation of MethodA()
Calling mySteerable.MethodA()
InterfaceB implementation of MethodA()
Calling myDrivable.MethodA()
InterfaceA implementation of MethodA()