for (int i = 1; i < 6; i++)
    MakeGaugePlot(i);

void MakeGaugePlot(int gaugeCount)
{
    double[] data = Enumerable.Range(0, gaugeCount)
        .Select(x => (double)Random.Shared.Next(10, 100))
        .ToArray();

    ScottPlot.Plot myPlot = new(200, 200);
    myPlot.AddRadialGauge(data);
    myPlot.SaveFig($"test-{gaugeCount}.png");
}