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I am using VS 2015 Pro. If I create a new project Class Library (portable) Targeting: NET Framework 4.0 Windows 8

all works fine.

BUT when I add to the targeting: Windows Phone 8.1

the following two errors appear:

There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll", "x86". This mismatch may cause runtime failures.

And the Linq not found:

The type or namespace name 'Linq' does not exist in the namespace 'System' (are you missing an assembly reference?)

(PS. I am sure that everything worked fine till I let Visual Studio 2015 update some Extensions)

NOTE If I target x86 the first error goes away, but the second remains.

1) What now is happening with the Windows Phone 8 and
where Visual Studio is loading the Windows Phone 8 assemblies?

2) How can I restore the Windows Phone 8 assemblies? enter image description here

EDIT

Project references

EDIT2

IMPORTANT If I change the targeting, and choose NET 4.0.3 the project compiles fine!

project compiles with Phone 8.1 and NET 4.0.3

EDIT3 IMPORTANT I have found that it has something to do with the Framework Profiles for NET portable, that are stored at: C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETPortable

(link framework profiles

Using Package Manager Console for my project: PM> $p.Properties.Item("TargetFrameworkMoniker").Value .NETPortable,Version=v4.0,Profile=Profile328

In the folder for Profile328 I have noted that there aren't inside the .dlls but only the .xml files... What happened?! How to restore?!

spiderman
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  • for Q1 . http://stackoverflow.com/questions/10113532/how-do-i-fix-the-visual-studio-compile-error-mismatch-between-processor-archit – Amit Kumar Ghosh Nov 23 '15 at 07:51
  • Please see ["Should questions include “tags” in their titles?"](http://meta.stackexchange.com/questions/19190/should-questions-include-tags-in-their-titles), where the consensus is "no, they should not"! –  Nov 24 '15 at 07:28

1 Answers1

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When you have the portable class library, you have this situation: In the .NET assembly there is all library if you want.

Try to delete project and create new portable class library

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daniele3004
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  • In my project the References tab is empty... (it suggest to use Object browser ... but for what?) Please see my edit – spiderman Nov 23 '15 at 08:12
  • I have tried to maually add the Linq reference from C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0 but nothing changes – spiderman Nov 23 '15 at 08:19
  • No... I have been busy, sorry... The problem is that I have created a new project (for investingating this issue). And the problem appear when I choose NET 4.0 and Phone 8.1 – spiderman Nov 23 '15 at 12:21
  • If I target NET 4.0.3 the project compiles fine! (But for backward compatibility reason I can't change the targeting) Where is VS2015 picking up the NET 4.0 and Phone 8.1 references...??? – spiderman Nov 23 '15 at 12:23
  • I use VS 2013 PRO, when I create the PortableClassLibrary I can choose the framework version. If i choose 4.0 my project run. – daniele3004 Nov 23 '15 at 12:53