IsValidEmail() public static method

This method returns whether a provided email address is valid
public static IsValidEmail ( string email ) : bool
email string
return bool
        /// <summary>
        /// Event fired when the Submit button is pushed
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void UpdateBtn_Click(object sender, EventArgs e)
        {
            int Pid = (int)PlayerID.Value;

            using (GamespyDatabase Database = new GamespyDatabase())
            {
                // Make sure there is no empty fields!
                if (AccountNick.Text.Trim().Length < 3)
                {
                    MessageBox.Show("Please enter a valid account name", "Error");
                    return;
                }
                else if (!Validator.IsValidEmail(AccountEmail.Text))
                {
                    MessageBox.Show("Please enter a valid account email", "Error");
                    return;
                }
                else if (Pid != AccountId)
                {
                    if (!Validator.IsValidPID(Pid.ToString()))
                    {
                        MessageBox.Show("Invalid PID Format. A PID must be 8 or 9 digits in length", "Error");
                        return;
                    }
                    // Make sure the PID doesnt exist!
                    else if (Database.UserExists(Pid))
                    {
                        MessageBox.Show("Battlefield 2 PID is already taken. Please try a different PID.", "Error");
                        return;
                    }
                }

                Database.UpdateUser(AccountId, Pid, AccountNick.Text, AccountPass.Text, AccountEmail.Text);
            }
            this.Close();
        }
        private void CreateBtn_Click(object sender, EventArgs e)
        {
            int Pid = (int)PidBox.Value;

            using (GamespyDatabase Database = new GamespyDatabase())
            {
                // Make sure there is no empty fields!
                if (AccountName.Text.Trim().Length < 3)
                {
                    MessageBox.Show("Please enter a valid account name", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    return;
                }
                else if (AccountPass.Text.Trim().Length < 3)
                {
                    MessageBox.Show("Please enter a valid account password", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    return;
                }
                else if (!Validator.IsValidEmail(AccountEmail.Text))
                {
                    MessageBox.Show("Please enter a valid account email", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    return;
                }

                // Check if PID exists (for changing PID)
                if (PidSelect.SelectedIndex == 1)
                {
                    if (!Validator.IsValidPID(Pid.ToString()))
                    {
                        MessageBox.Show("Invalid PID Format. A PID must be 8 or 9 digits in length", "Error",
                                        MessageBoxButtons.OK, MessageBoxIcon.Warning);
                        return;
                    }
                    else if (Database.UserExists(Pid))
                    {
                        MessageBox.Show("PID is already in use. Please enter a different PID.", "Error",
                                        MessageBoxButtons.OK, MessageBoxIcon.Warning);
                        return;
                    }
                }

                // Check if the user exists
                if (Database.UserExists(AccountName.Text))
                {
                    MessageBox.Show("Account name is already in use. Please select a different Account Name.", "Error",
                                    MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    return;
                }

                try
                {
                    // Attempt to create the account
                    if (PidSelect.SelectedIndex == 1)
                    {
                        Database.CreateUser(Pid, AccountName.Text, AccountPass.Text, AccountEmail.Text, "00");
                    }
                    else
                    {
                        Database.CreateUser(AccountName.Text, AccountPass.Text, AccountEmail.Text, "00");
                    }

                    Notify.Show("Account Created Successfully!", AccountName.Text, AlertType.Success);
                }
                catch (Exception E)
                {
                    MessageBox.Show(E.Message, "Account Create Error");
                }
            }

            this.DialogResult = DialogResult.OK;
            this.Close();
        }