C# 把String字符串，按指定长度分割

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/// <summary> ///  把字符串按照指定长度分割 /// </summary> /// <param name="txtString">字符串</param> /// <param name="charNumber">长度</param> /// <returns></returns> private ArrayList GetSeparateSubString(string txtString, int charNumber) {     ArrayList arrlist = new ArrayList();     string tempStr = txtString;     for (int i = 0; i < tempStr.Length; i += charNumber)     {         if ((tempStr.Length - i) > charNumber)//如果是，就截取         {             arrlist.Add(tempStr.Substring(i, charNumber));         }         else         {             arrlist.Add(tempStr.Substring(i));//如果不是，就截取最后剩下的那部分         }     }     return arrlist;     //假设txtString为"我的未来不是梦",charNumber为2     //那么返回的是["我的"，"未来","不是"，"梦"] }