During the using declaration, you can give the namespace or the full qualified name an alias.
For example:
using C = System.Console; class MainClass/*from www . jav a 2s .c om*/ { public static void Main(string[] args) { C.WriteLine("book2s.com"); } }
An entire namespace can be aliased, as follows:
using S = System; class MainClass/*from w ww . j a va 2 s. com*/ { public static void Main(string[] args) { S.Console.WriteLine("book2s.com"); } }