Mega Code Archive

 
Categories / C# / Language Basics
 

Using the as Keyword to Work with an Interface

using System;     public interface IPrintMessage {     void Print(); };     class Class1 {     public void Print()     {         Console.WriteLine("Hello from Class1!");     } }     class Class2 : IPrintMessage {     public void Print()     {         Console.WriteLine("Hello from Class2!");     } }     class MainClass {     public static void Main()     {         PrintClass   PrintObject = new PrintClass();             PrintObject.PrintMessages();     } }     class PrintClass {     public void PrintMessages()     {         Class1      Object1 = new Class1();         Class2      Object2 = new Class2();             PrintMessageFromObject(Object1);         PrintMessageFromObject(Object2);     }         private void PrintMessageFromObject(object obj)     {         IPrintMessage PrintMessage;             PrintMessage = obj as IPrintMessage;         if(PrintMessage != null)             PrintMessage.Print();     } }