怎么样替换换行符？

Question

string str=TextBox1.Text;
str=str.Replace("\n","<br>");

Answer 1

string.Replace("\n","<br>");为什么会行不通？

Answer 2

string str="fdaoiji\nerwewr";
Console.WriteLine(str);
str=str.Replace("\n","<br>");
Console.WriteLine(str);output:fdaoiji
nerwewr
fdaoiji<br>nerwewr你要做什么？例外一种
string str=@"fdaoiji\nerwewr";
Console.WriteLine(str);
str=str.Replace(@"\n","<br>");
Console.WriteLine(str);output:fdaoiji\nerwewr
fdaoiji<br>nerwewr

Answer 3

using System;public class ReplaceTest {
    public static void Main() {        string errString = @"line
new line";
 
        Console.WriteLine("原来的字串:{0}'{1}'{0}", Environment.NewLine, errString);        // Correct the spelling of "document".        string correctString = errString.Replace("\r\n", "<br>");        Console.WriteLine("替换以后:{0}'{1}'", 
                Environment.NewLine, correctString);
    }
}

Answer 4

输出：
E:\Documents\C# Code\Txt2Html>String.Replace.exe
原来的字串:
'line
        new line'替换以后:
'line<br>       new line'