NetworkServiceRetry.cs

internal async Task<T> RetryInner<T>(Func<Task<T>> func,
                                         int retryCount,
                                         Func<Exception, int, Task> onRetry)
{
  return await Policy
                  .Handle<Exception>()
                  .RetryAsync(retryCount, onRetry)
                  .ExecuteAsync<T>(func);
}