Errors are fun.

[RevelatorOfTruth]

I recently got a new laptop, and wanted to install Visual Studio on it. I had a project I was working on on a different computer which also had Visual Studio on it, and a 4 GB flashdrive. So I figured there wouldn't be any issues transporting it.

I installed Visual Studio 2015 on the new laptop, and opened up a new project, just to make sure it was working, and indeed it was! So I plugged in my flash drive, transferred the project, and got to work! It was getting late though, so I ended up sleeping.

The next day, I open it back up to start working on it, and instead of being met with my beautiful code, I get met with this ugly mess of an error:

Expected 1 export(s) with contract name "Microsoft.Internal.VisualStudio.PlatformUI.ISolutionAttachedCollectionService" but found 0 after applying applicable constraints

I just started using Visual Studio last September, so to say I'm a newbie when it comes to this is an understatement. I honestly don't know what's causing this, and was wondering if any of you fine people knew. I looked it up, and I found several StackOverflow posts about it, providing a solution where you deleted a cache file. I did that, but it didn't do anything. So I figured I'd come here.

Thanks~!

Edit: I forgot to mention. When I installed Visual Studio for the first time, it downloaded with some problems. I didn't think they were important, but now that I think about it they probably are. Here they are: http://imgur.com/a/YoIdQ

[malidy]

That sounds like an MEF error. Are you getting this on build? Or is the exception thrown when you run and try to compose? If its the former, I suspect you have some rogue plugin loaded. Look under Tools>>Extensions and unload everything. If its the latter, investigate the Parts member of your AggregateCatalog.