HeapProfiler.DiffViewer.Timeline_RangeChanged C# (CSharp) Method

        private void Timeline_RangeChanged(object sender, EventArgs e)
        {
            var pair = Timeline.Selection;

            if (pair.CompareTo(PendingLoadPair) != 0) {
                if (PendingLoad != null) {
                    PendingLoad.Dispose();
                    PendingLoad = null;
                    PendingLoadPair = Pair.New(-1, -1);
                }
            } else {
                return;
            }

            if (pair.CompareTo(CurrentPair) != 0)
                PendingLoad = Start(LoadRange(pair));
        }