"The LINQ expression could not be translated": string[] {}.Contains error if use as LINQ predicate about exprelsior

[alexmurari]

Hi, @mariomenjr!

I think i've found the issue, it's a EF Core limitation, if you look closely, you'll see that Exprelsior builds the Contains method call with a IEqualityComparer instance of type StringComparer with the OrdinalIgnoreCase strategy,

Apparently, EF Core doesn't support string comparisons with that StringComparer, see issue dotnet/efcore#1222.

One way to solve this is to remove the StringComparer strategy from the Contains method on Exprelsior, but this means that comparisons will not ignore character casing anymore (the default comprarer is Ordinal) and I must ponder the implications of that (I even feel it's a breaking change). Or wait for EF Core to support this, which doesn't seen to be happening. 😆

As for the debuging error, it's because the assemblies are strong-name signed with a password protected key, I will look for a solution for that. In the meantime, you can just modify the project settings to remove the strong-name requirement.