asp.net textarea换行函数代码

/// <summary> 
/// 替换html中的特殊字符 
/// </summary> 
/// <param name="theString">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; 
} 