It had been awhile since I generated the Early-bound classes
used by a command-line setup program (MSFT
walkthrough). I had forgotten about
the crmsvcutil.exe parameter that generates the CrmOrganizationServiceContext:
/codeCustomization:"Microsoft.Xrm.Client.CodeGeneration.CodeCustomization,
Microsoft.Xrm.Client.CodeGeneration"
After adding the Microsoft.Xrm.Client.CodeGeneration.dll and
Microsoft.Xrm.Client.dll to the directory, the App.config constructor was available
again:
using
(XrmServiceContext xrm = new XrmServiceContext("Xrm"))