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# to create user control demo source code, demo program is a sort strings in " raw string:"　Enter a string, click the keyboard Tab key, you can also reverse a string function, not only to learn the user control the preparation method, also incidentally studied the C# string sorting capabilities, do both