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A "completely empty" WPF application project targetting framework 3.5 takes more than 30 seconds to start on Windows 7 embedded SP1.

The problem doesn't appear on Windows 7 Enterprise SP1 neither on Windows XP.

The only thing in the WPF project is a declaration/initialization of a ConcurrentQueue coming from System.Threading.dll:

private static readonly ConcurrentQueue<String> _queue = new ConcurrentQueue<string>();

I had to use this dll because the ConcurrentQueue doesn't exist in the 3.5 framework.

This seems like a system issue, could this be a problem between the two ConcurrentQueue? The one in my dll and the one in the framework 4.0 installed on the Windows 7 embedded computer?

Some relevant information

The System.Threading dll's version is 1.0.2856.102

Edit

As suggested by @Sinatr I created another ConcurrentQueue (copy paste of ConcurrentQueue, SystemCollectionsConcurrent_ProducerConsumerCollectionDebugView and IProducerConsumerCollection with ILSpy).

This solves the problem but I would like to know why.

nkoniishvt
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  • @AdrianoRepetti That's what I thought, the problem I face made me doubt it – nkoniishvt Aug 04 '15 at 08:18
  • @AdrianoRepetti I'll install Visual Studio on this computer to check this. – nkoniishvt Aug 04 '15 at 08:38
  • This sounds like a hack: your project is targeting 3.5, but you are adding (via references?) dll containing `ConcurrentQueue` from 4.0. Maybe you should not do that, but rather simply implement it yourself? See [here](http://stackoverflow.com/q/4555307/1997232). – Sinatr Aug 04 '15 at 08:43
  • @Sinatr This is a good point but concurrency is a very complicated matter. I probably shouldn't try to implement it myself, I'll try to decompile System.Threading.dll using ILSpy and rename the collection. But knowing what exactly causes the problem would be interesting – nkoniishvt Aug 04 '15 at 09:10

1 Answers1

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You might need to disable the fetching of symbols. Tools -> Options -> Debugging -> Symbols -> uncheck Microsoft Symbol Servers.

tomab
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  • Thank you for the suggestion but it's already unchecked (default is probably unchecked because I don't remember ever changing it) – nkoniishvt Aug 04 '15 at 08:18