The name '' does not exist in the current context

Question

I have a recurring problem where all of a sudden I can no longer see the values of my variables when I debug my unit tests. I cannot find a pattern as to when this happens but I experience this across one of every 20 tests that I write. Occasionally this
has also happened during normal debbuging of running code on my machine. 
I have included 2 screen shots. The first is when it is working. I have a break point set at the declaration of list of types. At this point all my variables are still reporting their values back to the debugger. Once I step over this to the next line (screen
shot 2) I get the error message 'The name '[variable name]' does not exist in the current context'
This problem is annoying me to no end. If anyone has any insight as to why this might be happening I would be very much appreciative.
My Settings/Configuration
Using Visual Studio 2013 Premium (Version 12.0.31101.00 Update 4)
Projects are all set to Target Framework = .NET 4.5.1
Resharper 9.1 is installed
My active configuration is debug mode, Any CPU
My PC is 64bit and so is the O/S windows 8.1
All of my projects are also compiled and built in debug mode
For all my projects configuration debug has the Optimize Code check box unchecked
I am unit testing code in an outside project referenced by the unit testing project (standard unit test project setup)
I make use of the latest version of NSubstitute in my tests although I do not think that would have any bearing on this issue
I omitted the code following the error because it is not relevant. I had cut it out and replaced it with a Task.Delay(4) which resulted in the same issue. 
What I have tried so far
I have tried debugging the unit test  from Visual Studio Test Explorer instead of from Resharper with the same result.
If I remove 2 items at the end of the array it starts to work again (so 6 items initialized instead of 8)
I clean solution with rebuild has no effect
Removing properties of the array also seems to work, example remove all initialization of property Value
Mark as answer or vote as helpful if you find it useful | Igor

Answer 1

Hi IWolbers,
>>I have a recurring problem where all of a sudden I can no longer see the values of my variables when I debug my unit tests. I cannot find a pattern as to when this happens but I experience this across one of every 20 tests that I write. Occasionally
this has also happened during normal debbuging of running code on my machine.
So you mean that it worked well before, am I right? 
If you debug the same app in other VS machine, does it work well? So we could make sure that whether it is related to the VS IDE.
Please disable all add-ins in your VS IDE, and then reset your VS settings, debug it again.
https://msdn.microsoft.com/en-us/library/ms247075(v=vs.100).aspx
Or you could run your VS in safe mode, debug it again, at least, we could know that whether it is the add-in's issue.
https://msdn.microsoft.com/en-us/library/ms241278.aspx
To make sure that it is not the project files' issue, create a new blank solution, copy the project files to the new solution, clean and rebuild the solution, check the result.
>>Once I step over this to the next line (screen shot 2) I get the error message 'The name '[variable name]' does not exist in the current context'
How about debugging it with "Step Into" instead of "Step Over"? Or you could add breakpoints between 234 line to 241 line, after the breakpoint is hit, check the watch window again. How about the result?
In addition, do you check other debugger window like local or others?
Best Regards,
Jack
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