C# 关键字替换

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/// <summary> /// 关键字替换 /// </summary> /// <param name="body"></param> /// <returns></returns> public string TagReplace(string body) {     string[] begin = this.txtTagBegin.Text.Split('|');     string[] end = this.txtTagEnd.Text.Split('|');     string a = string.Empty, b = string.Empty;       for (int i = 0; i < begin.Length; i++)     {         a = begin[i];//第一个关键字         if (!string.IsNullOrEmpty(a))//不为空         {             try             {                 b = end[i];//替换字符为空             }             catch { }             body = body.Replace(a, b);         }     }     return body; }