/// <summary>
/// Provides a deterministic way to create the MainWindowViewModel property.
/// </summary>
public static void CreateMainWindowViewModel()
{
if (_mainWindowViewModel == null)
{
_mainWindowViewModel = new MainWindowViewModel();
}
}
/// <summary>
/// Provides a deterministic way to delete the MainWindowViewModel property.
/// </summary>
public static void ClearMainWindowViewModel()
{
_mainWindowViewModel.Cleanup();
_mainWindowViewModel = null;
}