Use the 'as' operator to perform a safe cast : As : Operator C# Examples

    
using  System;
using  System.IO;

class  MainClass
{
        public  static  void  Main()  
        {
                Object  someObject  =  new  StringReader("This  is  a  StringReader");

                
                StringReader  reader  =  someObject  as  StringReader;
                if  (reader  !=  null)  
                {
                        Console.WriteLine("as:  someObject  is  a  StringReader");
                }
        }
}