C # knowledge to consolidate a

Console program, several signature Main function

1 public static void Main() { }
2 public static int Main() { }
3 public static void Main(string[] args) { }
4 public static int Main(string[] args) { }
5 public static async Task Main() { }
6 public static async Task<int> Main() { }
7 public static async Task Main(string[] args) { }
8 public static async Task<int> Main(string[] args) { }

View Code

What type of function

• Methods (Method)
• Properties (property)
• Events (Event)
• Indexers (index)
• User-defined operators (custom operator)
• Instance constructors (instance constructors)
• Static constructors (static constructor)
• Destructors (destructor)

 Identifiers, definitions and relationships keywords

 It is applied to the variable identifier, class, method, and various other general terms user-defined objects. You shall observe the following rules when naming identifiers:

• Identifiers can not begin with a number and can not contain spaces.
• Identifiers can contain uppercase and lowercase letters, numbers, underscores and @ characters.
• The identifier must be case-sensitive. Uppercase and lowercase letters are considered different letters.
• @ Character is only the first character identifier. An identifier with an @ prefix is ​​called a verbatim identifier.
• You can not use C # keywords. However, the @ character add keywords can be a legal identifier, it is not recommended.
• Not the same as the library name to C #

 Keyword (for viewing only, no memory)

 

 Contextual keyword (for viewing only, no memory)

 

 Reference links:

Microsoft's official documentation Main function

Microsoft's official documentation Function Members

C # identifiers and keywords

 Microsoft's official documentation C # key