internal static string CheckEmail()

in FirebaseAdmin/FirebaseAdmin/Auth/UserRecordArgs.cs [126:145]

• 19 lines of code
• 5 McCabe index (conditional complexity)

        internal static string CheckEmail(string email, bool required = false)
        {
            if (email == null)
            {
                if (required)
                {
                    throw new ArgumentNullException(nameof(email));
                }
            }
            else if (email == string.Empty)
            {
                throw new ArgumentException("Email must not be empty");
            }
            else if (!Regex.IsMatch(email, @"^[^@]+@[^@]+$"))
            {
                throw new ArgumentException($"Invalid email address: {email}");
            }

            return email;
        }