Roslyn failed to compile code

Question

After I have migrated my project from VS2013 to VS2015 the project no longer builds. A compilation error occurs in the following LINQ statement:

static void Mai         


        

Answer 1

This does appear to be a bug, or at the least a regression, in the Roslyn compiler. The following bug has been filed to track it:

https://github.com/dotnet/roslyn/issues/4509

In the meantime, Jon's excellent answer has a couple of work arounds.