using System;using System.Collections.Generic;using System.Linq;using System.Text;//首先需要导入命名空间using System.Text.RegularExpressions;namespace WindowsFormsApplication1{   public class Class1    {       /// 
       /// 将html文本转化为 文本内容方法NoHTML       /// 
       /// HTML文本值       /// 
             public string NoHTML(string Htmlstring)        {            //删除脚本               Htmlstring = Regex.Replace(Htmlstring, @"
     
      ]*?>.*?", "", RegexOptions.IgnoreCase);            //删除HTML               Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"([/r/n])[/s]+", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"
      
     

简单版本：

public string NoHtml(string html){    string StrNohtml = System.Text.RegularExpressions.Regex.Replace(html, "<[^>]+>", "");    StrNohtml = System.Text.RegularExpressions.Regex.Replace(StrNohtml, "&[^;]+;", "");    return StrNohtml;}