asp.net textarea换行函数代码

/// <summary>
/// 替换html中的特殊字符
/// </summary>
/// <param>需要进行替换的文本。</param>
/// <returns>替换完的文本。</returns>
public string HtmlEncode(string theString)
{
theString=theString.Replace(">", "&gt;");
theString=theString.Replace("<", "&lt;");
theString=theString.Replace(" ", " &nbsp;");
theString=theString.Replace("\"", "&quot;");
theString=theString.Replace("\'", "&#39;");
theString=theString.Replace("\n", "<br/> ");
return theString;
}