Kumar_Nagaraju said:

I want to get the maximum size of the label on any AxisItem of a composite chart.

Any idea how I can get this maximumsize occupied as a size object?

i think this code will help:

        private void ultraChart1_FillSceneGraph(object sender, FillSceneGraphEventArgs e)
        {

            Axis layerXAxis = this.ultraChart1.CompositeChart.ChartLayers[0].ChartLayer.Grid["X"] as Axis;
            float maxLabelWidth = float.MinValue;
            float maxLabelHeight = float.MinValue;
           
            foreach (Primitive p in e.SceneGraph)
            {
                Text t = p as Text;
                if (t != null && t.bounds.Top > layerXAxis.startPoint.Y)
                {
                    // assume this is an x-axis label since it's below the x axis
                    SizeF labelSize = Platform.GetLabelSizePixels(t.GetTextString(), t.labelStyle);
                    maxLabelWidth = Math.Max(maxLabelWidth, labelSize.Width);
                    maxLabelHeight = Math.Max(maxLabelHeight, labelSize.Height);
                }
            }
        }

Kumar_Nagaraju said:

Also please throw some light on how the AxisLabelInfoCollection is being used

internally.

it's used for processing the labels through anti-collision algorithms when Axis.N.Labels.Layout.Behavior is set to Auto or UseCollection.  i don't there is any use for this class in an application.