/// <summary>Close form button click event handler</summary>
/// <param name="sender">object</param>
/// <param name="e">EventArgs</param>
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
if (m_isLicenseValid)
{
//we're shutting down, so just try to save what we can
int ignore1, ignore2;
m_License.WriteAliases(out ignore1, out ignore2);
m_License.WriteLicenseFile(LicenseConfiguration.LicenseFilePath);
}
}