LoopThroughSliders.cs

// The usual setup        
protected override void SolveInstance(IGH_DataAccess DA)
{
    // More standard setup
    int index = this.Params.IndexOfInputParam("Inputs");
    List<IGH_Param> L = this.Params.Input[index].Sources.ToList();

    doc = Grasshopper.Instances.ActiveCanvas.Document;
    if (runCount < MAX_RUN) // MAX_RUN = 20, runCount starts with 0
    {
        doc.SolutionEnd += OnSolutionEnd;
    }
        
    DA.SetData(0, GenerateLog(L)); // Just sets the output of slider values
        
}

private void OnSolutionEnd(object sender, GH_SolutionEventArgs e)
{
    if (runCount >= MAX_RUN)
    {
        e.Document.RequestAbortSolution();
        e.Document.SolutionEnd -= OnSolutionEnd;
        return;
    }

    if(runCount < MAX_RUN)
    {

        int index = this.Params.IndexOfInputParam("Inputs");
        List<IGH_Param> L = this.Params.Input[index].Sources.ToList();
        LoopThroughSliders(e.Document, L);
        e.Document.NewSolution(false, GH_SolutionMode.Default); 

    }
}

private void LoopThroughSliders(GH_Document doc, List<IGH_Param> Inputs)
{
    Inputs.ForEach(input =>
    {
        if (input.GetType() == typeof(GH_NumberSlider))
        {
            var r = new Random();
            var slider = input as GH_NumberSlider;

            decimal sliderMax = slider.Slider.Maximum;
            decimal sliderMin = slider.Slider.Minimum;
            double sliderMaxDouble = Convert.ToDouble(sliderMax);
            double sliderMinDouble = Convert.ToDouble(sliderMin);
            double mappedRand = MapValue(0, 1, sliderMinDouble, sliderMaxDouble, r.NextDouble());

            //slider.Slider.RaiseEvents = false;
            slider.Slider.Value = (decimal)mappedRand;
            //slider.Slider.RaiseEvents = true;

        }
    });
    runCount++;
}