Conflict between refeneces in Lightswitch\ and Silverlight\ after update to Visual Studio 2013 12.0.40302.00 and SQL Server Data Tools 12.0.50226.0

Question

After updating VS and SSDT there began a conflict with references in two directories under the SDKs folder (Lightswitch and Silverlight):
Error 91
The type 'System.Data.Services.Client.DataServiceCollection<T>' exists in both '
...\Microsoft SDKs\LightSwitch\v4.5\Client\Microsoft.Data.Services.Client.SL.dll' and 'both '
...\Microsoft SDKs\Silverlight\v5.0\Libraries\Client\System.Data.Services.Client.dll'
...\SPDCDataObjectContext.cs 1478
52 Spac.DesktopClient
I thought since the Lightswitch directory was newer that I would comment out the Silverlight directory and see how far that would get me. Now I get:
Error 16
The type or namespace name 'Composition' does not exist in the namespace 'System.ComponentModel' (are you missing an assembly reference?)
...\Spac.DesktopClient\GeneratedArtifacts\ApplicationGenerated.cs
13 36
Spac.DesktopClient
How do I handle the original conflict between refeneces in Lightswitch\ and Silverlight\ ?
Scott Mitchell

Answer 1

Thank you. Yes that resolves the conflict but leaves some missing references like the "Composition"
reference above. I was able to get past that by adding System.ComponentModel.Composition. This is after installing the VS 2013 update 4 build.
Now I get the following. I'm concerned that I'm taking references from both Lightswitch and Silverlight
sdk's just to get it to build. These references are required because of the auto generated code. I must have something quirked. Anyway what about System.Data.Common.DbConnection? How can I get it without
referencing System.Data?
Error 2
The type 'System.Data.Common.DbConnection' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
C:\Source\splat\Splat.Spac\Spac\Spac.Server\GeneratedArtifacts\ApplicationDataObjectContext.cs
50 16
Spac.Server
Scott Mitchell