Error message “No exports were found that match th

Question

This morning I faced a problem while opening my Visual Studio solution, and when I tried to run it, it said:

No exports were found that match the constraint contract name

How can I fix this problem?

Answer 1

I got this error after reinstalling IntelliJ IDEA and ReSharper for C# in Visual Studio 2013.

First, I got an error problem with extensions, and after this I got this error:

"No exports were found that match the constraint contract name”

I simply removed folder ComponentModelCache and resolved this error.

Answer 2

Deleting the Component Model Cache did not work for me (well, the relative directory given above did not exist in my machine). Instead, I installed an extension to Visual Studio 2012 Express. Menu Tools → *Extensions and Updates...** → Online → Choose any and then download. This apparently invalidates the cache causing Visual Studio to rebuild it.

Here's my source.

Answer 3

For Visual Studio 2013 you need to remove that folder from this path:

%AppData%\..\Local\Microsoft\VisualStudio\12.0

Answer 4

I experienced a similar problem after some updates released from Microsoft (part of them where about .NET framework 4.5).

On the Internet I got the following link to the Microsoft knowledge base article:

Update for Microsoft Visual Studio 2012 (KB2781514)

It worked for me.

Answer 5

I got an error with the same error message - two years later. It's a different problem this time though, related to .NET Core dnx things.

I couldn't find an answer on Stack Overflow, but in a GitHub issue it contains a workaround: https://github.com/aspnet/Home/issues/1455

Below is the most important part of the workaround:

• Delete the entire C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Web Tools\DNX directory. (As far as I understand, it belongs to the old version of ASP.NET Core RC1, which for some reason is still shipped even with Visual Studio 2015 Update-3).
• Delete the C:\Users\<user>\AppData\Local\Microsoft\VisualStudio\14.0\devenv.exe.config file.
• Run the Developer Command Prompt for Visual Studio 2015 as Administrator, and execute the devenv /setup command. The new devenv.exe.config file is generated. This time there are many assemblies that refer to the C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\DotNet directory.
• Run the Visual Studio 2015 and check that it shows the Microsoft .NET Core Tools (Preview 2) 14.1.20624.0 in the Help => About Microsoft Visual Studio menu.

Thanks to olegburov's post on GitHub for figuring this out.

Answer 6

I have Windows 7 x64 with a second partition on which Windows 8 (preview installed). While working with Microsoft Visual Studio Express 2012 for Windows Phone, I come up with the same problem. But the ComponentModelCache is found here:

C:\Users\Jayaram\AppData\Local\Microsoft\VPDExpress\11.0

I am unable to delete or rename as I get the "access is denied" message when I try to use command prompt:

Administrator: VS2012 X64 CrossToolsCommandPrompt