Lost FIleIOPermissions in SpecialFolders

Question

I did search for an answer to this but couldn't find anything that related and is probably something simple I am overlooking but I can't find it.

I have been writing/updating a VB program for the past 8 years or so and saving data to the MyDocuments folder as well as reading/writing to the QuickBooks datafile, XML files, and text files located there. Everything works fine if I compile and run using VS2015 but I recently decided to upgrade to VS2017. The code compiles without error but will not read or write to any folder located in My.Computer.FileSystem.SpecialDirectories. StreamReader/StreamWriter return "no permission" exceptions as well as XMLWriter, OleDB connections, etc. I can have full access to other folders such as D:\Temp but not "MyDocuments" (D:\!Data) or any other of the "SpecialDirectories". 

Bringing the code back up in VS2015 compiles and works just fine but I can't find a setting in VS2017 that is different and that turns off those privileges.

Any help or suggestions would be appreciated!

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Rich Lucas

Answer 1

Did you check the next simple fragment too?

   Dim a = My.Computer.FileSystem.SpecialDirectories.MyDocuments
   Dim b = Path.Combine(a, "MyTest.txt")
   File.WriteAllText(b, "TEST")

Answer 2

I have tried just about every method of reading and writing to a file that exists. They all work when compiled with VS2015 but throw exceptions with VS2017.

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Rich Lucas

Answer 3

Something got giggled when you moved to VS2017.

It was probably just waiting to happen. Maybe it's time to enhance your code with some Permissions

Have a look at the FileIOPermission Class: https://msdn.microsoft.com/en-us/library/system.security.permissions.fileiopermission(v=vs.110).aspx

Answer 4

Finally, I just uninstalled VS2017 totally, rebooted, re-installed VS2017 from scratch, and problem solved. Everything works as expected.

Thanks to those who did reply with helpful suggestions!

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Rich Lucas

Answer 5

Hi Lucas,

If your issue's been resolved, please help mark a reply as answer.  

Have a nice day.

Best regards,

Fletch

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