private string EnsureDatabaseFile()
 {
     if (!File.Exists(Constants.DataBaseCompletePath))
     {
         if (_fileService.AssetExists(Constants.DataBaseName))
         {
             try
             {
                 _fileService.MoveAsset(Constants.DataBaseName, Constants.DataBaseCompletePath);
             }
             catch
             {
                 File.Create(Constants.DataBaseCompletePath).Dispose();
             }
         }
         else
         {
             File.Create(Constants.DataBaseCompletePath).Dispose();
         }
     }
     return(Constants.DataBaseCompletePath);
 }