Can't Delete .vtpk file after loading

[SamuelGrosenick]

Hello, 

I'm working on basemap control in a Xamarin Forms app targeting UWP. I am using v100.4.0. The app has the ability to load any .vtpk's and .tpk's that are in the device's My Documents folder. I want the user to be able to remove any of these .vtpk or .tpk files from the app if they would like too.

I'm currently able to add/remove any .tpk's. I am also able to load and delete .vtpk's, but only as long as I don't turn that basemap on. It seems that once I load a vector tile layer, the file stays locked in memory. I have tried turning on a .vtpk and then switching to another basemap, but I still cannot delete the file. I am getting a System.IO.IOException saying "The process cannot access the file xxx.vtpk because it is being used by another process"

Again, I am able to load a .tpk file, turn it on and off, then delete it with no problem. It just gives me that error if I try to delete a .vtpk once I have turned it on.

Any ideas on how to remove the vector tile layer from memory once I have switched to another basemap? Thanks.

[Anonymous User]

I have the same problem in the ArcGis Runtime SDK for .NET v100.6

[KavitaPandey]

I am also facing the same issue. Did you get any solution for this?

[dotMorten_esri]

Sometimes the garbage collector can get a little lazy on cleaning up. Try forcing a GC prior to deleting:
GC.Collect();
GC.WaitForPendingFinalizers();

[KavitaPandey]

Thanks Morten I did that . Put above GC force deletion code above deleting the .vtpk file but it is still giving same error.

[dotMorten_esri]

Make sure all references to the layer is completely out of scope (no live variables pointing to it directly or indirectly), or the GC has no effect.

[SamuelGrosenick]

Hi Kavita, I haven't found a solution to this yet, unfortunately.