I've added vertex double click event by
For Each v In GraphSimple1.graphlayout.Children
If TypeOf v Is VertexControl Then
AddHandler TryCast(v, VertexControl).MouseDoubleClick, AddressOf v_MouseDoubleClick
End If
Next v
it Works well but how can i get vertex value which i've clicked
sender is your VertexControl so need to cast it to type VertexControl and can use it.