查看是不是中文

 public bool IsChina(string CString)
        {
            bool BoolValue = false;
            for (int i = 0; i < CString.Length; i++)
            {
                if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1))) > Convert.ToInt32(Convert.ToChar(128)))
                {
                    BoolValue = true;
                }

            }
            return BoolValue;
        }