AutoCAD .NET :: Coordinates For Center Of Viewport In WCS

I've been trying to get the center coordinates of a viewport for the last few days with no consistent success. Here's the code I've been using:

using (Database _wdb = HostApplicationServices.WorkingDatabase){using (Transaction _trn = _wdb.TransactionManager.StartTransaction()){ Editor _ edt = Application.DocumentManager.MdiActiveDocument.Editor; Viewport _cvp =(Viewport)_ trn. GetObject (_edt. Current Viewport ObjectId,Open Mode.ForRead); Point2d _try1 = _cvp.ViewCenter;Point3d _try2 = _edt.GetCurrentView().Target;} }

 The "ViewCenter" property will occasionally return a valid point, but mostly they both return (0,0) or something similar.