The role of a character in C # @

Disclaimer: This article is a blogger original article, shall not be reproduced without the bloggers allowed. https://blog.csdn.net/u011966339/article/details/90236700

Previously only know @ In C # to write a file path \ escape but do not add the identifier with @ in front, I did not think there are other role!

1. Ignore the escape character
, for example,

string fileName = "D:\\文本文件\\text.txt";

After use

string fileName = @"D:\文本文件\text.txt";

 

2. Let the string interbank
example

string strSQL = "SELECT * FROM HumanResources.Employee AS e"
   + " INNER JOIN Person.Contact AS c"
   + " ON e.ContactID = c.ContactID"
   + " ORDER BY c.LastName";

 

After use

string strSQL = @"SELECT * FROM HumanResources.Employee AS e
    INNER JOIN Person.Contact AS c
    ON e.ContactID = c.ContactID
    ORDER BY c.LastName";

3. Usage identifier

C # is not allowed to use keywords as identifiers (like variable names, method names, table space, etc.), but then if coupled with @ on it
, 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");
            }
}