'Open' is not a member of ApplicationServices.DocumentCollection

[daniel.messenger]

I have a VB.NET 4.0 app which was working fine with references to ObjectARX 2011.

I have removed these references and added references to ObjectARX2013, and now I get the following error at compile time:

'Open' is not a member of 'Autodesk.AutoCAD.ApplicationServices.DocumentCollection'

Code:

Dim docs As DocumentCollection
docs = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager
docs.Open(sDrawingPath, False) 

Everything else works fine - if I common out the last line then it compiles fine.

Does anybody have any ideas? 

[Alexander.Rivilis · Accepted solution]

DocumentCollectionExtension.Open

P.S.: Also read ObjectARX for AutoCAD 2013 Docs: Managed Class Reference -> Migration Guide->.NET Migration Guide