unfortunately there isn't a way to get rid of this space in the chart... however you can work around this limitation by using a panel to hide the sides of the chart.

         <Canvas Height="100" Width="100">
        <igChart:XamChart Height="105" Width="115" Canvas.Left="-12" Canvas.Top="-3">
            <igChart:XamChart.Series>
                <igChart:Series ChartType="Bar" />
            </igChart:XamChart.Series>
            <igChart:XamChart.Axes>
                <igChart:Axis AxisType="PrimaryY" Visible="True" StrokeThickness="0">
                    <igChart:Axis.MajorTickMark>
                        <igChart:Mark Visible="False" />
                    </igChart:Axis.MajorTickMark>
                </igChart:Axis>
                <igChart:Axis AxisType="PrimaryX" Visible="True" AutoRange="False" Minimum="1" Maximum="2" Unit=".5" StrokeThickness="0">
                    <igChart:Axis.MajorGridline>
                        <igChart:Mark Visible="False" />
                    </igChart:Axis.MajorGridline>
                    <igChart:Axis.MajorTickMark>
                        <igChart:Mark Visible="False" />
                    </igChart:Axis.MajorTickMark>
                </igChart:Axis>
            </igChart:XamChart.Axes>
            <igChart:XamChart.Legend>
                <igChart:Legend Visible="False" />
            </igChart:XamChart.Legend>
        </igChart:XamChart>
        </Canvas>

Hi David, thanks for the response!

So this only kind of gets me there- but I dont really know how to use the xamChart very well yet.  

The problem is that I have a custom panel needing this grid line.  In the example above, the x axis is still bordered on both sides by a significant margin, as well as needing a height > 100 to actually show the labels.

What I am looking for is a control where the width = 100% of the available space, and the labels are still visible even if the axis control is only 50 high or so.

Maybe xamChart can do this and I just dont know how?