Change Arrowhand

Can I change Arrowhand before drawning link ? And draw link already with new Arrowhand?

You can use any FrameworkElements you want as the arrowhead. You can change them dynamically, if you want.

The LinkDemo sample demonstrates a number of arrowhead shapes.

Thanks for reply. Can diagram draw link with already choosed arrowhead from arrowheads combobox ?

You just need to make sure the arrowhead shape in your go:LinkPanel element of your Link’s DataTemplate is the way you want it.

In the LinkDemo sample, the has its Points attribute data-bound to a property in the sample, so that the ComboBox can choose dynamically. But normally the Points are hard-coded in the XAML, as you can see in most of the other samples.