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Producing contract reference assemblies for .NET Framework 4.6 #291
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This pull request adds compiling and installing contract reference assemblies specific for .NET Framework 4.6. This pull request does not add any new system contracts for .NET Framework 4.6, but it would be a prerequisite for adding any such contracts.
Why do we need 4.6-specific assemblies?
.NET Framework 4.6 adds new overloads to frequently used methods. For example, there are now
in addition to
This causes innocently looking code like this:
to fail static contract verification when targeting .NET Framework 4.6 because the specific overload is not present in .NET 4.5 CRAs.
Caveats
Building new contract reference assemblies requires .NET Framework 4.6 and .NET Framework 4.6 Targeting Pack to be installed on the build machine.
An alternative would be to stuff another 100MB of reference assemblies into
Microsoft.Research\Imported\ReferenceAssemblies
, but we seem to feel strongly about not doing so.