How can I draw a line graph from array of values?

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C#

public class VerticalForceGraph
    {
        private List<VerticalForce> vtfList = new List<VerticalForce>();

        public int BufferSize { get; set; }

        public void Add(VerticalForce vtf)
        {
            vtfList.Add(vtf);
        }

        public void Reset() { vtfList.Clear(); }

        public int Count {get{return vtfList.Count;} }

        public float[] GetLeftVTF()
        {
            return vtfList.Select(x => (float)x.Left).ToArray();
        }

private VerticalForceGraph vtfGraph = new VerticalForceGraph();

public void setVTFData(float[] frameValues)
        {
            if (vtfGraph != null)
            {
                vtfGraph.Add(new VerticalForce(frameValues));
            }
        }

//this is a panel in which i want to display line chart

private void VtfGraphicalViewMode(Graphics graphics)
       {


           Pen yellowPen = new Pen(Color.Yellow, 2);
           Pen bluePen = new Pen(Color.Blue, 2);
           Pen redPen = new Pen(Color.Red, 2);
           int hOffset = heatmapWidth / 2;
           int vOffset = heatmapHeight / 2;
           //Display title
           using (Font title_font = new Font("Times New Roman", 20))
           {

               using (StringFormat string_format = new StringFormat())
               {
                   string_format.Alignment = StringAlignment.Center;
                   string_format.LineAlignment = StringAlignment.Center;
                   Point title_center = new Point(this.heatmapWidth / 2, 20);
                   Point titleleft = new Point(this.heatmapHeight / 4, heatmapWidth / 10);


                   Font leftfornt = new Font("Times New Roman", 10);
                   Font totalfont = new Font("Times New Roman", 10);
                   Font rightfont = new Font("Times New Roman", 10);



                   graphics.SmoothingMode = SmoothingMode.AntiAlias;
                   graphics.DrawRectangle(outline, new Rectangle(heatmapCoord_X, heatmapCoord_Y, heatmapWidth, heatmapHeight));
                   Rectangle graph_area = new Rectangle(heatmapCoord_X, heatmapCoord_Y, heatmapWidth, heatmapHeight);
                   graphics.FillRectangle(Brushes.LightBlue, graph_area);
                   Label label = new Label();
                   graphics.DrawString("VTF Grahical View",
                          title_font, Brushes.Red,
                          title_center, string_format);



                   //Y-axis
                   int xOffset = 50;
                   int yOffset = 20;
                   graphics.DrawLine(redPen,
                                   heatmapCoord_X + xOffset, heatmapCoord_Y + (heatmapHeight - 50), heatmapCoord_X + xOffset, heatmapCoord_Y + yOffset
                                  );


                   //X-axis
                   graphics.DrawLine(redPen,
                                   heatmapCoord_X + (heatmapWidth - 10), heatmapCoord_Y + (heatmapHeight - 50), heatmapCoord_X + xOffset, heatmapCoord_Y + (heatmapHeight - 50)
                                  );


                   //MessageBox.Show(vtfGraph.Count.ToString());
                   if (vtfGraph.Count > 0)
                   {
                       float[] left = vtfGraph.GetLeftVTF(0, (vtfGraph.Count > 100 ? 100 : vtfGraph.Count - 1));

                       for (int i = 0; i < 100; i++)
                       {


                       }



                   }
               }
           }

What I have tried:

//left has array of values
//i want to plot these values in line graph
//i already defines x and y axis

float[] left = vtfGraph.GetLeftVTF(0, (vtfGraph.Count > 100 ? 100 : vtfGraph.Count - 1));