# DataGridControl.CustomSummary event

Occurs when a summary value is calculated. Set the SummaryValue property to implement a custom summary.

```csharp
public event EventHandler<DataGridCustomSummaryEventArgs>? CustomSummary;
```

## See Also

* class [DataGridCustomSummaryEventArgs](../DataGridCustomSummaryEventArgs.md)
* class [DataGridControl](../DataGridControl.md)
* namespace [Eremex.AvaloniaUI.Controls.DataGrid](../index.md)

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