private static void BackupCacheFile(System.IO.IsolatedStorage.IsolatedStorageFile store)
 {
     if (store.FileExists(DataContextDataHandler.LocalFileName))
     {
         store.CopyFile(DataContextDataHandler.LocalFileName, DataContextDataHandler.LocalFileNameWhenCrashed, true);
     }
 }
 private static bool ReplaceCurrentDatabasFileFrom(string newFileName, System.IO.IsolatedStorage.IsolatedStorageFile store)
 {
     store.DeleteFile(TinyMoneyDataContext.DbFileName);
     store.CopyFile(newFileName, TinyMoneyDataContext.DbFileName, true);
     return true;
 }