ILOG just announced the launch of ILOG Diagrammer for .NET, its new set of 
tools, components and libraries for creating graphical and interactive .NET 
applications. 
Diagrammer for .NET is a set of Windows and Web Forms controls, editing 
tools, and a comprehensive API for displaying and editing diagrams, networks, 
dashboards, and SCADA/HMI screens within Microsoft .NET Framework. 

It enables developers to create fully functional diagrams in minutes by 
using Microsoft Visual Studio 2005. Most of the development is done 
graphically, and users can work with their preferred Microsoft .NET 
languages, including Microsoft Visual C#, Microsoft Visual Basic .NET, and 
Managed C++. 

Applications created with Diagrammer for .NET can be deployed either as 
Windows Forms or Web Forms. The package also includes ASP.NET Ajax controls 
to edit diagrams in Web applications, and to manage smooth refreshes when 
zooming or panning. 

More at: http://www.ilog.com/products/diagrammernet/
Image gallery available at: 
http://www.ilog.com/products/diagrammernet/gallery.cfm
Online demos available at: http://www.ilog.com/products/diagrammernet/demos/

Thanks