private string DurationString(Model.Download download)
{
int hours = download.Duration / 3600;
int mins = (download.Duration - (hours * 3600)) / 60;
int secs = (download.Duration - (hours * 3600)) - (mins * 60);
return string.Format(CultureInfo.InvariantCulture, "{0:0:; ; }{1:00}:{2:00}", hours, mins, secs);
}