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 is not a bug. See https://github.com/dotnet/roslyn/issues/4509#issuecomment-130872713 for an example of how a dynamic expression of this form can leave such an out variable unassigned.