Public Function Add( _
   ByVal AbstractSyntax As String _
) As DicomContext

This method may only be used on the Contexts property of a DicomConnection before calling SetDestination.
This is the only programmatic means of creating a DicomContext item, and after creation, an appropriate list of transfer contexts to be offered by setting the new item’s OfferedTS property.
Note that in keeping with the DICOM requirement, newly added contexts have odd values, so adding two items to a DicomContexts collection using this method will create item numbers 1 and 3, not 1 and 2.

DicomContexts Collection  | DicomContexts Members