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If you have a Xamarin.Forms project, and you try to persist data with the Application.Current.Properties dictionary (<string, object>), and you store an object insted of a primitive data type, the dictionary will not persist after rebooting.
Steps for recreating:
1. Create new Xamarin.Forms project
2. Create your Main Page.
3. Insert an object - could be any object, in the dictionary.
4. Reboot app - dictionary is now empty.
NOTE: This is for WindowsPhone only.
Thank you for taking the time to submit the bug. We tried to reproduce the issue you reported but were unable given the description. If you could please attach a reproduction to the bug by starting with a clean Xamarin.Forms project and adding just the code necessary to demonstrate the issue we would very much appreciate it. We monitor recently touched NEEDS INFO bugs so we’ll notice you attached the reproduction we’ll take it from there.
Xamarin Forms Team
I have hit the same problem when saving Color values.
What appears to be happening is that when writing to storage, it is doing a ToString() on the object being passed. If you cannot cast from a string back to that type of object, then you get a System.FormatException when trying to re-create your object.
From the documentation, it would appear that it should be able to store any type of object, presumably using reflection to do so. Using ToString() is not what I expected, and sure breaks my initial attempt at loading Color values.
I should have mentioned, I am using 220.127.116.1158-pre2
We are adding the ability to specify serializers for the properties so you can extend its capacities. Thank you for taking the time to submit this feature request. We like this idea and have added it to our internal feature tracking system.
Xamarin Forms Team