1.忽略轉義字符
例如
string fileName = "D:\\文本文件\\text.txt";
使用@后
string fileName = @"D:\文本文件\text.txt";
2.在標識符中的用法
C#是不允許關鍵字作為標識符(類名、變量名、方法名、表空間名等)使用的，但如果加上@之后就可以了
例如
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"
);
}
}
3.讓字符串跨行
string
strSQL =
"SELECT * FROM HumanResources.Employee AS e"
+
" INNER JOIN Person.Contact AS c"
+
" ON e.ContactID = c.ContactID"
+
" ORDER BY c.LastName"
;
使用@后
string
strSQL =
@"SELECT * FROM HumanResources.Employee AS e
INNER JOIN Person.Contact AS c
ON e.ContactID = c.ContactID
ORDER BY c.LastName"
;