The 3 roles of @ in C #

Previously only know @ in C # in order to write the file path of \ Do not add the escape character and in front with the @ identifier, did not expect @ there are other functions

1. Ignore escape characters
For example

String fileName = "d:\\ text file \\text.txt";

After using @

String fileName = @ "d:\ text file \text.txt";

2. Let the string cross the line
For example

String strSQL = "SELECT * from HumanResources.Employee as E"   + "INNER JOIN person.contact as C"   + "on E.contacti D = C.contactid "   +" ORDER by C.lastname ";

After using @

String strSQL = @ "SELECT * from HumanResources.Employee as e    INNER joins Person.Contact as C on    E.contactid = C.con Tactid    ORDER by C.lastname ";

3. Usage in identifiers

C # is not allowed to use the keyword as an identifier (class name, variable name, method name, tablespace name, etc.), but if you add @
For example

public static void @static (int @int) {            if (@int > 0)            {                System.Console.WriteLine ("Positive Integer");            }            else if (@int = = 0)            {                System.Console.WriteLine ("Zero");            }            else            {                System.Console.WriteLine ("negative Integer");}            }

　　

Reference reference: http://www.2cto.com/kf/201009/74766.html

The 3 roles of @ in C #