SIPSorcery.CustomerSettingsControl.UpdatePasswordButton_Click C# (CSharp) Method

        private void UpdatePasswordButton_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            if (m_oldPasswordTextBox.Password.IsNullOrBlank())
            {
                m_statusTextBlock.Text = "The old password must be specified.";
            }
            else if (m_newPasswordTextBox.Password.IsNullOrBlank())
            {
                m_statusTextBlock.Text = "The new password must be specified.";
            }
            else if (m_retypeNewPasswordTextBox.Password.IsNullOrBlank())
            {
                m_statusTextBlock.Text = "The retyped new password must be specified.";
            }
            else if (m_newPasswordTextBox.Password.Trim() != m_retypeNewPasswordTextBox.Password.Trim())
            {
                m_statusTextBlock.Text = "The new password did not match the retyped password.";
            }
            else
            {
                SetUpdateButtonsEnabled(false);
                UIHelper.SetText(m_statusTextBlock, "Updating password, please wait...");
                m_riaContext.ChangePassword(m_oldPasswordTextBox.Password.Trim(), m_newPasswordTextBox.Password.Trim(), UpdateCustomerPasswordComplete, null);
                ClearPasswordFields();
            }
        }