Can't add reference to .NET Portable Class Library

Question

I'm trying to build the OsmSharp latest download from their GIT repo. https://osmsharp.codeplex.com/

The problem is that I try and build and get a load of errors. The main one seems to be

"Error 296 Cannot define a new extension method because the compiler required type 'System.Runtime.CompilerServices.ExtensionAttribute' cannot be found. Are you missing a reference to System.Core.dll?"

This is a Portable Class Library and so I try to add the reference by right-clicking on the project and choosing "Add Reference", choosing .NET and I have nothing to add!

Anyone any ideas on how to get a list of .NET references to add?

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Where would I browse the reference from? I always expect .NET references to be internal things from the framework and not like a DLL I need to manually add. — AdamantUK, Jan 05 '14 at 18:58
Sorry I misread it , I thought you wanted to reference the DLL you built — meda, Jan 05 '14 at 19:00
see this post http://stackoverflow.com/questions/13748055/could-not-load-type-system-runtime-compilerservices-extensionattribute-from-as. — Rahul, Jan 05 '14 at 19:08
Thanks for the link, this machine doesn't have .NET 4.5 installed however so that doesn't apply in this case. — AdamantUK, Jan 05 '14 at 19:13

score 0 · Answer 1 · answered Apr 15 '15 at 15:50

0

I had this problem because there weren't any Target Frameworks set in the Library section of the project properties. Adding a couple fixed the issue.

answered Apr 15 '15 at 15:50

dmet

1

Can't add reference to .NET Portable Class Library

1 Answers1