WPF

public class NetworkNode
{
        string Caption;
        string Type;
        int ID = 0;
        int X = 0;
        int Y = 0;
}

public class EndNode : NetworkNode {}
public class RouterNode : NetworkNode {}

public class Connection
{
        int StartNode = 0;
        int EndNode = 0;
}

<ItemsControl>
  <ItemsControl.Items>
    <cc:EndNode    ID="0" Caption="Node" X="70" Y="20"/>
    <cc:RouterNode ID="1" Caption="Router" X="220" Y="120"/>
    <cc:EndNode ID="2" Caption="Router" X="120" Y="50"/>

    <cc:Connection StartNode="0" EndNode="1"/>
    <cc:Connection StartNode="1" EndNode="2"/>
  </ItemsControl.Items>
</ItemsControl>

MyWinForm myForm = new MyWinForm();
     WpfUserControl uc = new WpfUserControl();

     if (ListBox.SelectedItem != null)
       {
          WPFObject selObject = Listbox.SelectedItem as WPFObject;
          uc.GetObjects(selObject);
          myForm.Controls.Add(uc); 
          myForm.Visible = true;
       }