through_the_interface Connecting points to curves

[Sgear]

I was try to convert this sample to VB.NET

http://through-the-interface.typepad.com/through_the_interface/2016/05/connecting-points-to-curves-b...

if I try the command CBC I get this error
Public member 'ToArray' on type 'WhereEnumerableIterator(Of Object)' not found

if I try the command B2C I get this error
Public member 'ConnectPointToCurve' on type 'AppTransaction' not found.

and when I close Autocad I get this
R6025
- pure virtual function call