AutoCAD .NET :: Converting 2D Polyline To Regular

Although I have found code that should allow me to convert 2dpolylines to regular polylines, I am having troubles implementing it.  At first I got the eInvalid Input but have since fixed that.  However, the error now is that there is no error.  Autocad just seems to lock up but I can still switch to visual studio and look at my code.  It as though Autocad thinks it is doing something but my code is not doing anything.  I can scroll around.

My code is this:

Try Dim acDrawing As Document = Application.DocumentManager.MdiActiveDocument
Using acDrawingLock As DocumentLock = acDrawing.LockDocument
Using acTransaction As Transaction = acDrawing.Database.TransactionManager.StartTransaction
Dim acBlockTable As BlockTable =

[code]........