Smrf.NodeXL.Visualization.Wpf.GraphDrawer.AddVisualOnTopOfGraph C# (CSharp) Method

    AddVisualOnTopOfGraph
    (
        Visual visual
    )
    {
        Debug.Assert(visual != null);
        AssertValid();

        const String MethodName = "AddVisualOnTopOfGraph";

        if ( m_oVisualCollection.Contains(visual) )
        {
            Debug.Assert(false);

            throw new InvalidOperationException( String.Format(

                "{0}.{1}: Visual has already been added."
                ,
                this.ClassName,
                MethodName
                ) );
        }

        m_oVisualCollection.Add(visual);
    }