/// <summary>
/// Closes the project
/// </summary>
public void Close()
{
_projectApp.FileCloseAll(PjSaveType.pjDoNotSave);
_projectApp.Quit(PjSaveType.pjDoNotSave);
_projectApp = null;
// Wait 3 second for the application to quit and clean itself up.
System.Threading.Thread.Sleep(3000);
}