namespace BomLocalService.Utilities; public static class ValidationHelper { /// /// Validates suburb and state parameters /// Returns error message if validation fails, null if valid /// public static string? ValidateLocation(string suburb, string state) { if (string.IsNullOrWhiteSpace(suburb)) { return "Suburb is required"; } if (string.IsNullOrWhiteSpace(state)) { return "State is required"; } return null; } }