Steffen Winkler Steffen Winkler - 4 days ago 6
C# Question

.cs files can't be opened anymore in VS 2013 Professional Update 4

I'm facing a problem where I can't open .cs files in Visual Studio 2013 after one day.

It started on Monday: I opened an existing solution and tried to open the Program.cs file but instead was met with the following error message (rough translation):


No exports were found that meet the constraint:

ContractName

Microsoft.VisualStudio.Utilities.IContentTypeRegistryService

RequiredTypeIdentity

Microsoft.VisualStudio.Utilities.IContentTypeRegistryService


I tried opening .cs files in different solutions and always got the same message. The only exception being: Any Visual Studio instance that was opened before the Visual Studio instance in which the exception first occured was/is not affected by this.

I managed to get it working by choosing to repair the Visual Studio installation and rebooting but that only worked until the next day.

I tried searching for that message but got nothing so far.

Answer

Delete or rename this folder:

C:\users\\AppData\Local\Microsoft\VisualStudio\12.0\ComponentModelCache\

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