# DataGridControl.CustomColumnGroup event

Occurs when two rows are compared during grouping. Set the Result property to indicate whether the rows belong to the same group.

```csharp
public event EventHandler<DataGridCustomColumnGroupEventArgs>? CustomColumnGroup;
```

## See Also

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

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