Shulou(Shulou.com)06/03 Report--

The first character of a variable must be: letter, underscore, Chinese character, or @

The first character can be followed by letters, numbers, underscores, or Chinese characters

Variable name cannot be the same as keyword

Eg: variable names cannot take these keywords such as int, double, if, using, namespace, and so on.

Because these guys already have a special meaning, if you really want to take the keyword as the variable name, you can use @ int, @ double, and so on.

C# variable names are strictly case-sensitive

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