public void RemoveItemFromListByValue(DownloadOperationValue value)
{
var index = DownloadList.ToList().FindIndex(i => i.Value == value);
if (index == -1)
{
return;
}
var item = DownloadList[index].Key;
item.FinishedTime = DateTime.Now.ToString("h:mm tt");
DownloadFinishedList.Insert(0, DownloadList[index].Key);
DownloadList.RemoveAt(index);
}