UTF8字符串转换为汉字 c#

 using System;

 /// <summary>
 /// UTF8字符串转换为汉字用的类
 /// 转换如"\\u8d35"之类的字符串为对应的汉字
 /// </summary>
 class UTF8String
 {
     string m_strContent = "";
     /// <summary>
     /// 构造函数
     /// </summary>
     /// <param name="content">要转换的字符串</param>
     public UTF8String(string content)
     {
         m_strContent = content;
     }
     public string getContent()
     {
         return m_strContent;
     }
     /// <summary>
     /// 转换函数
     /// </summary>
     /// <returns>返回转换好的字符串</returns>
     public string ToString()
     {
         string reString = null;
         char[] content = m_strContent.ToCharArray(); //把字符串变为字符数组，以进行处理
         for (int i = ; i < content.Length; i++) //遍历所有字符
         {
             if (content[i] == '\\') //判断是否转义字符 \
             {
                 switch (content[i + ]) //判断转义字符的下一个字符是什么
                 {
                     case 'u': //转换的是汉字
                     case 'U':
                         reString += HexArrayToChar(content, i + ); //获取对应的汉字
                         i = i + ;
                         break;
                     case '/': //转换的是 /
                     case '\\': //转换的是 \
                     case '"':
                         break;
                     default: //其它
                         reString += EscapeCharacter(content[i + ]); //转为其它类型字符
                         i = i + ;
                         break;
                 }
             }
             else
                 reString += content[i]; //非转义字符则直接加入
         }
         return reString;
     }

     /// <summary>
     /// 字符数组转对应汉字字符
     /// </summary>
     /// <param name="content">要转换的数字</param>
     /// <param name="startIndex">起始位置</param>
     /// <returns>对应的汉字</returns>
     private char HexArrayToChar(char[] content, int startIndex)
     {
         char[] ac = new char[];
         for (int i = ; i < ; i++) //获取要转换的部分
             ac[i] = content[startIndex + i];
         string num = new string(ac); //字符数组转为字符串
         return HexStringToChar(num);
     }

     /// <summary>
     /// 转义字符转换函数
     /// 转换字符为对应的转义字符
     /// </summary>
     /// <param name="c">要转的字符</param>
     /// <returns>对应的转义字符</returns>
     private char EscapeCharacter(char c)
     {
         char rc;
         switch (c)
         {
             case 't':
                 c = '\t';
                 break;
             case 'n':
                 c = '\n';
                 break;
             case 'r':
                 c = '\r';
                 break;
             case '\'':
                 c = '\'';
                 break;
             case '':
                 c = '\0';
                 break;
         }
         return c;
     }

     /// <summary>
     /// 字符串转对应汉字字符
     /// 只能处理如"8d34"之类的数字字符为对应的汉字
     /// 例子："9648" 转为 '陈'
     /// </summary>
     /// <param name="content">转换的字符串</param>
     /// <returns>对应的汉字</returns>
     public static char HexStringToChar(string content)
     {
         int num = Convert.ToInt32(content, );
         return (char)num;
     }

     /// <summary>
     /// 把string转为UTF8String类型
     /// </summary>
     /// <param name="content"></param>
     /// <returns></returns>
     public static UTF8String ValueOf(string content)
     {
         string reString = null;
         char[] ac = content.ToCharArray();
         int num;
         foreach (char c in ac)
         {
             num = (int)c;
             string n = num.ToString("X2");
             if (n.Length == )
                 reString += "\\u" + n;
             else
                 reString += c;
         }
         return new UTF8String(reString);
     }

 }