C#创建用户控件的演示源码，演示程序是一个排序字符串程序，在“原始字符串：”栏中输入字符串后，单击键盘Tab键，还可以进行逆序字符串功能，不但学习了用户控件的编写方法，还捎带研究了C#的字符串排序功能，一举两得-C# source code to create a user control to demonstrate the demonstration program is a sort string program in the original string: " enter the string, click the keyboard Tab key, you can also reverse a string function, not only learning the user control preparation, but also incidentally a C# string sort function, kill two birds with one stone