Chapter 2. C# Language Reference
This chapter walks you through each aspect of the C# language. Many features of C# will be familiar if you have experience with a strongly typed object-oriented language.
Identifiers
Identifiers are names programmers choose for their types, methods, variables, and so on. An identifier must be a whole word, essentially composed of Unicode characters starting with a letter or underscore. An identifier must not clash with a keyword. As a special case, the @ prefix can be used to avoid such a conflict, but the character isn’t considered part of the identifier that it precedes. For instance, the following two identifiers are equivalent:
C# identifiers are case-sensitive, but for compatibility with other languages, you should not differentiate public or protected identifiers by case alone.
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