How to Programmatically Add Column to Caption Summary Row in WPF DataGrid?

This sample show cases how to programmatically add column to caption summary row in WPF DataGrid (SfDataGrid).

DataGrid allows you to add column to CaptionSummaryRow programmatically by adding GridSummaryColumn to CaptionSummaryRow.SummaryColumns.

dataGrid.Loaded += DataGrid_Loaded;
addColumn.Click += addColumn_Click;

private void DataGrid_Loaded(object sender, System.Windows.RoutedEventArgs e)
{
    this.dataGrid.CaptionSummaryRow = new GridSummaryRow()
    {
        ShowSummaryInRow = true,
        Title = "Total Sales: {SalesAmount} for NumberOfYears: {NumberOfYears}",
        SummaryColumns = new ObservableCollection<ISummaryColumn>()
        {
            new GridSummaryColumn()
            {
                Name = "SalesAmount",
                MappingName="Total",
                SummaryType= SummaryType.Int32Aggregate,
                Format="{Sum:c}"
            }  ,
                new GridSummaryColumn()
            {
                Name = "NumberOfYears",
                MappingName="Year",
                SummaryType= SummaryType.CountAggregate,
                Format="{Count:d}"
            }
        }
    };
}

private void addColumn_Click(object sender, RoutedEventArgs e)
{
    this.dataGrid.CaptionSummaryRow.SummaryColumns.Add(new GridSummaryColumn() { Name = "Q1Sales", MappingName = "QS1", SummaryType = SummaryType.Int32Aggregate, Format = "{Sum:d}" });
    this.dataGrid.CaptionSummaryRow.Title = "Total Sales: {SalesAmount} for NumberOfYears: {NumberOfYears} and Quaterly Sales is {Q1Sales}";
    this.dataGrid.View.CaptionSummaryRow = this.dataGrid.CaptionSummaryRow;
    
    this.dataGrid.RowGenerator.Items.ForEach(o =>
    {
        if (o.RowType == RowType.CaptionCoveredRow || o.RowType == RowType.CaptionRow)
            o.GetType().GetProperty("RowIndex").SetValue(o, -1);
    });

    this.dataGrid.GetVisualContainer().InvalidateMeasureInfo();
}