/// <summary>
/// Cancel the task with the specified tag.
/// <param name="tag"></param>
/// </summary>
public static ITaskQueue <TTaskInfo> Deschedule <TTaskInfo>(this ITaskQueue <TTaskInfo> source, string tag)
where TTaskInfo : TaskInfo
{
var context = source.GetSchedulerContext();
var queue = context.Queue;
var item = queue.FirstOrDefault(x => x.Tag == tag);
if (item == null)
{
throw new InvalidOperationException($"Task with tag \"{tag}\" does not exist.");
}
return((ITaskQueue <TTaskInfo>)source.Deschedule(item));
}