UploadFilesAsync.cs

async Task<int> UploadFilesAsync(List<File> listOfFiles, IProgress<int> progress)
{
    int processCount = await Task.Run<int>(() =>
    {
        int tempCount = 0;
        
        foreach (var file in listOfFiles)
        {
            //await the uploading logic here
            int processed = await UploadFileAsync(file);
            
            if (progress != null)
            {
                progress.Report(tempCount);
            }
            
            tempCount++;
        }

        return tempCount;
    });
    
    return processCount;
}