C # Determines whether a string conforms to a regular expression in hexadecimal, octal, binary, and decimal integer format

        /// <summary>        ///determine if the hexadecimal format string/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public BOOLIshexadecimal (stringstr) {            Const stringPATTERN =@"[a-fa-f0-9]+$"; returnSystem.Text.RegularExpressions.Regex.IsMatch (str, PATTERN); }        /// <summary>        ///determine if octal format string/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public BOOLIsoctal (stringstr) {            Const stringPATTERN =@"[0-7]+$"; returnSystem.Text.RegularExpressions.Regex.IsMatch (str, PATTERN); }        /// <summary>        ///determines whether a binary format string/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public BOOLIsBinary (stringstr) {            Const stringPATTERN =@"[0-1]+$"; returnSystem.Text.RegularExpressions.Regex.IsMatch (str, PATTERN); }        /// <summary>        ///determines whether the decimal format string/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public BOOLIsdecimal (stringstr) {            Const stringPATTERN =@"[0-9]+$"; returnSystem.Text.RegularExpressions.Regex.IsMatch (str, PATTERN); }

C # Determines whether a string conforms to a regular expression in hexadecimal, octal, binary, and decimal integer format