How To Change The Captionsummary Expander Indicator Color In Winforms Datagrid?
customization
datagrid
expander
summaries
winforms
This sample illustrates how to change the CaptionSummary expander indicator color in WinForms DataGrid (SfDataGrid).
In DataGrid, you can change the group Expander color by setting SfDataGrid.Style.CaptionSummaryRowStyle.ExpanderColor property.
sfDataGrid1.Style.CaptionSummaryRowStyle.ExpanderColor = Color.Red;

Take a moment to peruse the WinForms DataGrid - Caption Summary documentation, where you can find about DataGrid Caption Summary with code examples.
Requirements to run the demo
Visual Studio 2015 and above versions.