Check Type of Object at Runtime in C#
If You want to check the TYPE of an object at runtime in C# then you have to use IS Keyword example : using System; class CApp { public static void Main() { string s = "Shubhank"; long i = 900; Console.WriteLine( "{0} is {1}an integer", s, (IsIntegerType(s) ? "" : "not ") ); Console.WriteLine( "{0} is {1}an integer", i, (IsIntegerType(i) ? "" : "not ") ); } static bool IsIntegerType( object obj ) { if( obj is int || obj is long ) return true; else return false; } } Output will be Shubhank is not an integer 900 is an integer