A couple of years ago, many customers were keeping sending feedback to DlhSoft, saying:
- We need Web (Silverlight™) Gantt Charts! and/or
- We have many tasks to display, we need higher performance!
Back then (and continously since) we’ve worked hard and eventually launched a new Gantt Chart Light Library product containing high performance, lightweight Gantt Chart controls (available for both Silverlight™ 4 and WPF 4) and then new versions and builds have followed, adding more features almost weekly.
The heart of the product is the GanttChartDataGrid control which essentially builds a Gantt Chart visualization to the right side of a synchronized tree-grid (that actually inherits basic behavior from the standard DataGrid control).
Version 4.1 included new controls:
- ScheduleChartDataGrid: displaying multiple assignments per row, so that you can build resource scheduling applications;
- LoadChartDataGrid: displaying allocation load information for resources in a timeline based chart that can easily be sinchronized to a Gantt Chart or Schedule Chart.
Today, version 4.2 (free to download and try for unlimited time) also includes a new PertChartView control that has also been much requested in the past. (We’ve covered some of its features in a previous post.)
In the short future we intend to also add a NetworkDiagramView control that would extend the project management suite of controls with a different topic situated somewhere between the Gantt Chart and the PERT Chart: a network diagram. And we also have more ideas for later, but that’s a story for another time. 
DlhSoft Team's Blog 