AutoCAD .NET :: What Is Happening In DocumentCreated

This is unexpected. I have a custom application class called TheApp. In it I have a private bool property called IsAssembly. In my command I set this value to true then create a new document. In the event handler, I check to see if the IsAssembly is true but it returns false. The only places this property is set is in the command and the event handler.

[code]
[CommandMethod("IFX_NEW_ASSEMBLY", CommandFlags.Session)]
public void NewAssembly()
{
     IsAssembly = true;
     Application.DocumentManager.Add(null);
}
[/code]

I have a handler for DocumentCreated

[code]
private void OnNewDocument(object sender, DocumentCollectionEventArgs args)
{
       if(IsAssembly)
       {
            ....Do something.
            IsAssembly = false;      
}
[/code]