private static void SelectBetween(this ISelectionService selectionService,
ISelectable[] siblings,
ISelectable start,
ISelectable end)
{
//Select nothing
selectionService.SelectNone();
//Determine the start and stop
var startIndex = siblings.IndexOf(s => s == start);
var endIndex = siblings.IndexOf(s => s == end);
//If for some reason the siblings weren't found, bail
if (startIndex == null || endIndex == null)
return;
//Always start from the "first" sibling
var effectiveStart = Math.Min(startIndex.Value, endIndex.Value);
var effectiveEnd = Math.Max(startIndex.Value, endIndex.Value);
//Mark them all as selected.
for (int index = effectiveStart; index <= effectiveEnd; index++)
{
selectionService.Select(siblings[index]);
}
}