//演示例子            string s = "大";            int i = GetStringExistCount("abcdf大大大大dssdf大dfsdfad大sre顶wf大大sda大fwefr", s);            Console.WriteLine("搜索到”{0}“在字符串中出现的总次数为[{1}]", s,i);            Console.ReadKey();

        /// <summary>          /// 取出现次数          /// </summary>          /// <param name="SumString">总文本</param>          /// <param name="SearchString">欲找文本</param>          /// <returns>找到返回出现的总次数，没找到返回0</returns>         public static int GetStringExistCount(string SumString, string SearchString)        {            SumString = SumString.Replace(SearchString, "╋");            return SumString.Split(‘╋‘).Length - 1;        }