Hi,

You could create a service (ASP.NET Web Service) project in your server solution and add a method that takes a string argument. The string will contain the diagram data passed by the clients, which you can load using LoadFromString().

Next, add a service reference to the client project, and when the user finishes editing the diagram, call the service method with a FlowChart.SaveToString() parameter value. That lets you receive the diagram data on the server, load it there, check its contents and structure, and possibly return some result to the client.

Using a service is probably the easiest solution, but you could transfer diagram strings and return results using any of the other .NET communication methods, e.g. TCP/IP connections, remoting or WCF.

I hope that helps,
Stoyan