Hi,

You don't need any logic in the .NET class, but only custom fields and serialization code if you will be saving diagram files on server. If you are asking about overriding methods in .NET classes such as AllowModify, Draw, etc, these are only used in the desktop version of the control, which shares the same assembly (although Draw would also be used in ASP.NET if you were using ImageMap mode).

If you don't care about saving diagram on server or inspecting the diagram model from .NET code, you could use only the JavaScript part of the control, which we also provide as a separate library -
http://mindfusion.eu/javascript-diagram.html

Using the ASP.NET control still has some benefits, for example it includes import / export libraries not available in JavaScript version.

Regards,
Slavcho
Mindfusion

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I mean the classes from MindFusion.Diagramming.Import / Export namespaces - letting you export the diagram to PDF, SVG, etc, or import from OpenOffice Draw or MS Visio. They are only available in .NET at this time.

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That's true, and Microsoft sunsetted Web Forms from what I know, it won't be implemented in the new ASP.NET Core framework. In any case we'll be supporting it while we still have active customers for it - people have legacy Web Forms applications, don't know JavaScript, etc. You could use this from server-side code only if you don't need to implement custom drawing in Canvas mode or add custom properties that you want to access on client side.

Regards,
Slavcho
Mindfusion