C # Regular Expression validation

 Public classVerifyutil {/// <summary>        ///the input string is judged to contain only Chinese characters/// </summary>        /// <param name= "input" ></param>        /// <returns></returns>         Public Static BOOLIschinesech (stringinput) {            returnRegex.IsMatch (Input,@"^[\u4e00-\u9fa5]+$"); }        /// <summary>        ///a phone number that matches the 3-bit or 4-bit area code, where the area code can be enclosed in parentheses .///You can also use a hyphen or a space between the area code and the local number .///You can also have no interval///\ (0\d{2}\) [-]?\d{8}|0\d{2}[-]?\d{8}|\ (0\d{3}\) [-]?\d{7}|0\d{3}[-]?\d{7}/// </summary>        /// <param name= "input" ></param>        /// <returns></returns>         Public Static BOOLIsphone (stringinput) {            stringPattern ="^\\ (0\\d{2}\\) [-]?\\d{8}$|^0\\d{2}[-]?\\d{8}$|^\\ (0\\d{3}\\) [-]?\\d{7}$|^0\\d{3}[-]?\\d{7}$"; returnRegex.IsMatch (Input,pattern); }        /// <summary>        ///determines whether the input string is a legitimate phone number/// </summary>        /// <param name= "input" ></param>        /// <returns></returns>         Public Static BOOLIsmobilephone (stringinput) {            returnRegex.IsMatch (Input,@"^1{3,5,8}\\d{9}$"); }        /// <summary>        ///the input string is judged to contain only numbers///can match integers and floating-point numbers///^-?\d+$|^ (-?\d+) (\.\d+)? $/// </summary>        /// <param name= "input" ></param>        /// <returns></returns>         Public Static BOOLIsnumber (stringinput) {            stringPattern =@"^-?\d+$|^ (-?\d+) (\.\d+)? $"; returnRegex.IsMatch (input, pattern); }        /// <summary>        ///determine if the input string is a valid email address/// </summary>        /// <param name= "input" ></param>        /// <returns></returns>         Public Static BOOLIsemail (stringinput) {            stringPattern =@"^ ([\w-\.] +) @ ((\[[0-9]{1,3}\. [0-9] {1,3}\. [0-9] {1,3}\.) | ([\w-]+\.) +)) ([a-za-z]{2,4}| [0-9] {1,3}) (\]?) $"; returnRegex.IsMatch (input, pattern); }        /// <summary>        ///determines whether the input string is a hyperlink/// </summary>        /// <param name= "input" ></param>        /// <returns></returns>         Public Static BOOLIsurl (stringinput) {            stringPattern =@"^[a-za-z]+://(\w+ (-\w+) *) (\. ( \w+ (-\w+) *) * (\?\s*)? $"; returnRegex.IsMatch (Input,pattern); }    }

C # Regular Expression validation