using System.Text.RegularExpressions; namespace WebApp.Models.Validators; public static class ValidatorHelper { public static bool ValidateEmail(string email) { if (email is null) return false; Regex validEmailRegex = new Regex("^[\\w-\\.]+@([\\w-]+\\.)+[\\w-]{2,4}$"); bool isValidEmail = validEmailRegex.IsMatch(email); bool containsUpperCase = email.Any(char.IsUpper); if (!isValidEmail || containsUpperCase) return false; return true; } }