public event EventHandler ContentLoaded

{
    // subscribe to the Added, Removed events for the elevation profile graph
    mapView.ElevationProfileGraphAdded += Mv_ElevationProfileGraphAdded;
    mapView.ElevationProfileGraphRemoved += Mv_ElevationProfileGraphRemoved;
    //Handles the event triggered when an elevation profile graph is removed.
    void Mv_ElevationProfileGraphRemoved(object sender, EventArgs e)
    {
        //TODO: handle the removal of the elevation profile graph
    }
    //Handles the event triggered when an elevation profile graph is added to the active map view.
    void Mv_ElevationProfileGraphAdded(object sender, EventArgs e)
    {
        // get the elevation profile graph from the view
        // this will be non-null since we are in a ElevationProfileGraphAdded handler
        var mv = MapView.Active;
        var graph = mv.GetElevationProfileGraph();

        // subscribe to the ContentLoaded event
        graph.ContentLoaded += Graph_ContentLoaded;
    }
    // Handles the event triggered when the elevation profile graph content is loaded.
    void Graph_ContentLoaded(object sender, EventArgs e)
    {
        // get the elevation profile graph
        var graph = sender as ArcGIS.Desktop.Mapping.ElevationProfileGraph;

        // get the elevation profile geometry
        var polyline = graph.Geometry;
        // get the elevation profile statistics
        var stats = graph.ElevationProfileStatistics;
    }
}