Commented Issue: IsolatedStorageException in Save() EndStoring AppSettingsStorageMechanism [225]

There is some issue with Save method in IsolatedStorageSettings.ApplicationSettings.Save();

Stack trace:
5 System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor 908
6 System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor 84
7 System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor 120
8 System.IO.IsolatedStorage.IsolatedStorageFile.OpenFile 84
9 System.IO.IsolatedStorage.IsolatedStorageSettings.Save 152
10 Caliburn.Micro.AppSettingsStorageMechanism.EndStoring 196
11 Caliburn.Micro.StorageCoordinator._Save_b__11 188
12 Caliburn.Micro.ExtensionMethods.Apply 272
13 Caliburn.Micro.StorageCoordinator.Save 1192
14 Caliburn.Micro.StorageCoordinator.OnDeactivated 180
Comments: You most probably hit the size quota for the IsolatedStorageFile that stores the ApplicationSettings: http://msdn.microsoft.com/en-us/library/system.io.isolatedstorage.isolatedstoragesettings.save%28v=vs.95%29.aspx Other possibility is this: On Silverlight for Windows Phone, IsolatedStorageSettings is not thread safe and throws an IsolatedStorageException when Save() is called. How much data are you trying to store?