说明：  考虑到C#中的string类提供的Split方法无法实现针对串参数的分割，所以自己解决了。主要实现了对String类的扩展，使之支持string参数的Split。
(C# taking into account the type of string Split method can not be realized against the division series parameters , and they therefore resolved. Major Implementation of the expansion of the String class that supports string parameters of Split.)