Exceptions thrown from Views when run from a net461 application do not contain line numbers or file info

[NTaylorMullen]

The reason why this occurs is because our CSharpCompiler.EmitOptions unconditionally sets the debugInformationFormat to the pdb format (can't be understood by .net framework). We should consider auto-detecting the current framework and set the PDB format accordingly.

Note that this blocks the RuntimeErrorAreListedByErrorPageMiddleware test from passing on net461.

This issue can be closed as a duplicate of dotnet/extensions#235 if we complete that one first. Leaving this issue here in-case we decide to go for a non-portable-pdb approach; the sdk will be moving to non-portable pdbs for desktop applications anyways so this may be more consistent with the rest of the system.

[NTaylorMullen]

/cc @anurse @DamianEdwards FYI if you don't see line numbers in your views when app building net461.

[analogrelay]

I had actually noticed this, thanks for the heads-up :)

[pranavkm]

Fixed in e5da44a