asp.net Password Validation example

using System;
using System.Text.RegularExpressions;

public void CreateNewUserAccount(string name, string password)
{
    // Check name contains only lower case or upper case letters, 
    // the apostrophe, a dot, or white space. Also check it is 
    // between 1 and 40 characters long
    if ( !Regex.IsMatch(userIDTxt.Text, @"^[a-zA-Z'./s]{1,40}$"))
      throw new FormatException("Invalid name format");

    // Check password contains at least one digit, one lower case 
    // letter, one uppercase letter, and is between 8 and 10 
    // characters long
    if ( !Regex.IsMatch(passwordTxt.Text, 
                      @"^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,10}$" ))
      throw new FormatException("Invalid password format");

    // Perform data access logic (using type safe parameters)
    ...
}