protected virtual void Dispose(bool disposing)
 {
     if (disposing)
     {
         _context?.Dispose();
     }
 }
 public void Dispose()
 {
     try
     {
         if (_context != null)
         {
             _context.Dispose();
         }
         GC.SuppressFinalize(this);
     }
     catch (Exception)
     {
         throw;
     }
 }
 public void Dispose()
 {
     _context.Dispose();
 }