C#判断字符串是否是数字

 /// <summary>
 /// 判断字符串是否是数字
 /// </summary>
 public static bool IsNumber(string s)
 {
     if (string.IsNullOrWhiteSpace(s)) return false;
     const string pattern = "^[0-9]*$";
     Regex rx = new Regex(pattern);
     return rx.IsMatch(s);
 }