I've got a method that needs to PUT data to a web API. Sometimes the connection fails, so I needed a way to do retries, but if the retries fail, I still need to capture the exception and re-throw it.

I've got something that I "believe" is working, but I've got a stupid throw at the end. Is there a better, more concise way to do this when working with async tasks?

    private const int TotalNumberOfAttempts = 10;

    public static async Task<HttpResponseMessage> PutWithRetriesAsync(string url,
        HttpContent content,
        AuthenticationHeaderValue authenticationHeaderValue,
        MediaTypeWithQualityHeaderValue mediaTypeWithQualityHeaderValue)
    {
        var numberOfAttempts = 0;
        ExceptionDispatchInfo capturedException;

        do
        {
            try
            {
                return await PutAsync(url, content, authenticationHeaderValue, mediaTypeWithQualityHeaderValue);
            }
            catch (AggregateException ex)
            {
                capturedException = ExceptionDispatchInfo.Capture(ex);
                numberOfAttempts++;
            }
        } while (numberOfAttempts < TotalNumberOfAttempts);

        if (capturedException != null)
        {
            capturedException.Throw();
        }
        throw new Exception("That will never be thrown");
    }

I've got a method that needs to PUT data to a web API. Sometimes the connection fails, so I needed a way to do retries, but if the retries fail, I still need to capture the exception and re-throw it.

I've got something that I "believe" is working, but I've got a stupid throw at the end. Is there a better, more concise way to do this when working with async tasks?

private const int TotalNumberOfAttempts = 10;

public static async Task<HttpResponseMessage> PutWithRetriesAsync(string url,
    HttpContent content,
    AuthenticationHeaderValue authenticationHeaderValue,
    MediaTypeWithQualityHeaderValue mediaTypeWithQualityHeaderValue)
{
    var numberOfAttempts = 0;
    ExceptionDispatchInfo capturedException;

    do
    {
        try
        {
            return await PutAsync(url, content, authenticationHeaderValue, mediaTypeWithQualityHeaderValue);
        }
        catch (AggregateException ex)
        {
            capturedException = ExceptionDispatchInfo.Capture(ex);
            numberOfAttempts++;
        }
    } while (numberOfAttempts < TotalNumberOfAttempts);

    if (capturedException != null)
    {
        capturedException.Throw();
    }
    throw new Exception("That will never be thrown");
}