is operator in class hiearchy : Is : Operator C# Examples

is operator in class hiearchy

    
using  System;  
  
class  A  {}  
class  B  :  A  {}  
  
class  MainClass  {  
    public  static  void  Main()  {  
        A  a  =  new  A();  
        B  b  =  new  B();  
  
        if(a  is  A)  
              Console.WriteLine("a  is  an  A");  
        if(b  is  A)    
            Console.WriteLine("b  is  an  A  because  it  is  derived  from  A");  
        if(a  is  B)    
            Console.WriteLine("This  won't  display  --  a  not  derived  from  B");  
        if(b  is  B)  
            Console.WriteLine("B  is  a  B");  
        if(a  is  object)  
            Console.WriteLine("a  is  an  object");  
    }  
}
    
   
  
   

a is an A
b is an A because it is derived from A
B is a B
a is an object

Related in same category :
• Type operators
• Use 'is' to avoid an invalid cast.
• Working with Interfaces
• Test if someObject is, or is derived from, a TextReader using the is operator
• 'is' operator for value data type
• Use is in Console.WriteLine