可以使用\n\r來實現，但要注意一下特殊字符處理，Insus.NET用@放在字符串前。
string s =
@"
+ 1 + \n\r + 2 + \n\r + 3 +
";
Response.Write( " <scr " + " ipt>alert(' " + s + " ')</scr " + " ipt> ");
Response.Write( " <scr " + " ipt>alert(' " + s + " ')</scr " + " ipt> ");
運行效果：
