# Customize Doughnut Charts in Presentations in .NET

> Discover how to create and customize doughnut charts in Aspose.Slides for .NET, supporting PowerPoint formats for dynamic presentations.

Source: https://docs.aspose.com/slides/net/doughnut-chart/
Updated: 2026-08-05


## **Overview**

This article shows how to work with a doughnut chart in Aspose.Slides by adding the chart to a slide, setting the size of its center hole, and saving the presentation. It focuses on the `DoughnutHoleSize` setting and demonstrates the basic steps required to customize this chart type in code.

It also includes a short FAQ covering related doughnut-chart scenarios, such as using multiple series to create multiple rings, working with exploded doughnut charts, and exporting a chart as a raster image or SVG.

## **Specify the Center Gap in a Doughnut Chart**
In order to specify the size of the hole in a doughnut chart. Please follow the steps below:

- Instantiate [Presentation](https://reference.aspose.com/slides/net/aspose.slides/presentation) class.
- Add doughnut chart on the slide.
- Specify the size of the hole in a doughnut chart.
- Write presentation to disk.

In the example given below, we have set the size of the hole in a doughnut chart.

```c#
using Aspose.Slides;
using Aspose.Slides.Charts;
using Aspose.Slides.Export;

// Create an instance of Presentation class
Presentation presentation = new Presentation();

IChart chart = presentation.Slides[0].Shapes.AddChart(ChartType.Doughnut, 50, 50, 400, 400);
chart.ChartData.SeriesGroups[0].DoughnutHoleSize = 90;

// Write presentation to disk
presentation.Save("DoughnutHoleSize_out.pptx", SaveFormat.Pptx);
```

## **FAQ**

### Can I create a multi-level doughnut with multiple rings?

Yes. Add multiple series to a single doughnut chart—each series becomes a separate ring. The ring order is determined by the order of the series in the collection.

### Is an "exploded" doughnut (separated slices) supported?

Yes. There is an Exploded Doughnut [chart type](https://reference.aspose.com/slides/net/aspose.slides.charts/charttype/) and an explosion property on data points; you can separate individual slices.

### How can I get an image of a doughnut chart (PNG/SVG) for a report?

A chart is a shape; you can render it to a [raster image](https://reference.aspose.com/slides/net/aspose.slides/shape/getimage/) or export the chart to an [SVG image](https://reference.aspose.com/slides/net/aspose.slides/shape/writeassvg/).