To create a doughnut chart, use the InnerRadius property like the following:

1. Select View | Properties Window in the Visual Studio menu.
2. Click the drop-down list at the top of the Properties window and select Panel1_C1PieChartExtender.
3. Locate the InnerRadius and set it to 30.

Creating a Doughnut Chart in Source View:

To create a Doughnut chart in source view, click the source tab and add the following code in your source file:

<cc1:C1PieChartExtender ID="Panel1_C1PieChartExtender" runat="server"

            Height="350" InnerRadius="30" TargetControlID="Panel1" Width="350">

            <SeriesTransition Duration="1000" Easing="EaseOutBounce">

            </SeriesTransition>

            <SeriesList>

                <cc1:PieChartSeries Data="46.78" Label="MacBook Pro" LegendEntry="True"

                    Offset="15">

                </cc1:PieChartSeries>

                <cc1:PieChartSeries Data="23.18" Label="iMac" LegendEntry="True">

                </cc1:PieChartSeries>

                <cc1:PieChartSeries Data="20.25" Label="MacBook" LegendEntry="True">

                </cc1:PieChartSeries>

                <cc1:PieChartSeries Data="5.41" Label="Mac Pro" LegendEntry="True">

                </cc1:PieChartSeries>

                <cc1:PieChartSeries Data="3.44" Label="Mac Mini" LegendEntry="True">

                </cc1:PieChartSeries>

            </SeriesList>

            <Footer Compass="South" Visible="False">

            </Footer>

            <Axis>

                <Y Compass="West" Visible="False">

                    <Labels TextAlign="Center">

                    </Labels>

                    <GridMajor Visible="True">

                    </GridMajor>

                </Y>

            </Axis>

        </cc1:C1PieChartExtender>

This topic illustrates the following:

The following image shows the doughnut chart created by using the innerRadius property.