Blazorise Chart Trendline component

@code {
    Chart<double?> chart;
    ChartTrendline<double?> chartTrendline;

    protected override async Task OnAfterRenderAsync( bool firstRender )
    {
        if ( firstRender )
        {
            await HandleRedraw();
        }
    }

    bool trendlinesOn = true;
    async Task OnButtonClicked()
    {
        trendlinesOn = !trendlinesOn;

        await HandleRedraw();
    }

    async Task HandleRedraw()
    {
        await chart.Clear();

        await chart.AddLabels( Labels );
        await chart.AddDataSet( GetLineChartDataset() );
        await chart.AddDataSet( GetLineChartDataset() );

        await chart.Update();

        // Add the trendline(s) after you have added the datasets and called await chart.Update();
        if ( trendlinesOn )
        {
            // This will add a trendline to the second dataset.
            // If you want to add it to the first dataset, set DatasetIndex = 0 (or don't set it at all as 0 is default)
            var trendlineData = new List<ChartTrendlineData>
            {
                new ChartTrendlineData
                {
                    DatasetIndex = 1,
                    Width = 10,
                    Color = ChartColor.FromRgba( 54, 162, 235, .6f )
                }
            };

            await chartTrendline.AddTrendLineOptions( trendlineData );
        }
    }

    LineChartDataset<double?> GetLineChartDataset()
    {
        return new LineChartDataset<double?>
        {
            Label = "# of randoms",
            Data = RandomizeData(),
            BackgroundColor = BackgroundColors,
            BorderColor = BorderColors,
            Fill = true,
            PointRadius = 2,
            BorderDash = new List<int> { }
        };
    }

    private static string[] Labels = { "A", "B", "C", "D", "E", "F" };

    private static List<string> BackgroundColors = new()
    {
        ChartColor.FromRgba( 76, 110, 245, 0.25f ),   // Indigo
        ChartColor.FromRgba( 18, 184, 134, 0.25f ),   // Teal
        ChartColor.FromRgba( 245, 159, 0, 0.25f ),    // Amber
        ChartColor.FromRgba( 240, 62, 62, 0.25f ),    // Red
        ChartColor.FromRgba( 132, 94, 247, 0.25f ),   // Purple
        ChartColor.FromRgba( 34, 139, 230, 0.25f )    // Blue
    };

    private static List<string> BorderColors = new()
    {
        ChartColor.FromRgba( 76, 110, 245, 1f ),      // Indigo
        ChartColor.FromRgba( 18, 184, 134, 1f ),      // Teal
        ChartColor.FromRgba( 245, 159, 0, 1f ),       // Amber
        ChartColor.FromRgba( 240, 62, 62, 1f ),       // Red
        ChartColor.FromRgba( 132, 94, 247, 1f ),      // Purple
        ChartColor.FromRgba( 34, 139, 230, 1f )       // Blue
    };

    List<double?> RandomizeData()
    {
        var r = new Random( DateTime.Now.Millisecond );

        return new List<double?> { r.Next( 3, 20 ) * r.NextDouble(), r.Next( 3, 30 ) * r.NextDouble(), r.Next( 3, 40 ) * r.NextDouble(), r.Next( 3, 50 ) * r.NextDouble(), r.Next( 3, 60 ) * r.NextDouble(), r.Next( 3, 70 ) * r.NextDouble() };
    }
}