C # Create your own extension method

C # can create its own extension methods extension method:

Refer to this article, "Judging whether it is empty and then assigning value" http://www.cnblogs.com/insus/p/8004097.html

, the first three methods, all appear null this keyword, in the judgment, you need = = NULL or!=null.

In fact, you can create a C # extension method to eliminate this complexity.

  Public Static classExtensionmethod { Public Static BOOLIsNull ( This Objectobj) {            returnobj = =NULL; }         Public Static BOOLIsnotnull ( This Objectobj) {            returnObj! =NULL; }    }

Source Code

Thus, in the previous article, method five could be produced:

"" : str;             "";

Source Code

C # Create your own extension method