How to avoid blinking by constantly redrawing figures

I have been working on a graph editor for the university in which I have to constantly redraw several figures, when I do it it seems that the figures are blinking, I was reading and I found a control called BoubleBuffered but I did not understand how to use it. used before? Or are there other options to solve this problem? I leave a small fragment of code as an example of how to draw.

private void Form1_Load(object sender, EventArgs e)
        {
            grafo = new Grafo();
            opcion = 0;
            g = CreateGraphics();
            bmp1 = new Bitmap(ClientSize.Width, ClientSize.Height);
            band = false;
            bandI = false;
            bandF = false;
    }

private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics gaux = CreateGraphics();

            gaux.Clear(BackColor);
            if (band)
            {
                bmp2 = (Bitmap)bmp1.Clone();
                g = Graphics.FromImage(bmp2);
                switch (opcion)
                {
                    case 2:
                        g.DrawLine(grafo.penA, grafo.BuscaInterseccion(nodoP.centro, p2), p2);
                        break;
                }
                gaux.DrawImage(bmp2, 0, 0);
                bmp2.Dispose();
                band = false;
            }
            else
            {
                g = Graphics.FromImage(bmp1);
                if (bandF)
                {
                    switch (opcion)
                    {
                        case 1:
                            g.FillEllipse(grafo.brushN, p1.X - grafo.radio, p1.Y - grafo.radio, grafo.radio * 2, grafo.radio * 2);
                            g.DrawEllipse(grafo.penN, p1.X - grafo.radio + (grafo.penN.Width /2), p1.Y - grafo.radio + (grafo.penN.Width / 2), grafo.radio * 2 - (grafo.penN.Width / 2), grafo.radio * 2 - (grafo.penN.Width / 2));
                            if (grafo.numN >= 28 || grafo.edoNom)
                                g.DrawString(nodoP.nombre.ToString(), grafo.font, grafo.brushF, p1.X - 6, p1.Y - 6);
                            else
                                g.DrawString(((char)(nodoP.nombre + 64)).ToString(), grafo.font, grafo.brushF, p1.X - 6, p1.Y - 6);
                        break;

                        case 2:
                            g.DrawLine(grafo.penA, grafo.BuscaInterseccion(nodoP.centro, nodoAux.centro), grafo.BuscaInterseccion(nodoAux.centro, nodoP.centro));
                        break;
                    }
                    bandF = false;
                }

                if(bandI)
                {
                    g.Clear(BackColor);
                    grafo.ImprimirGrafo(g);
                    bandI = false;
                }

                if(opcion == 6 || opcion == 7)
                {
                    g.Clear(BackColor);
                    if (opcion == 7)
                    {
                        grafo.Clear();
                        grafo.numN = 1;
                        grafo.edoNom = false;
                    }
                }
                gaux.DrawImage(bmp1, 0, 0);
            }
            gaux.Dispose();
        }

private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            p1 = e.Location;
            textBox1.Text = p1.ToString();
            switch(opcion)
            {
                case 1:
                    nodoP = new NodoP(grafo.numN++, p1);
                    grafo.Add(nodoP);
                    band = false;
                    bandF = true;
                    if (grafo.numN == 28)
                    {
                        bandI = true;
                        grafo.edoNom = true;
                    }
                    else
                        bandI = false;
                    Invalidate();
                    break;

                case 2:
                    nodoP = grafo.BuscaNodo(p1);
                    if (nodoP != null)
                    {
                        band = true;
                        bandA = true;
                    }
                    else
                    {
                        band = false;
                        bandI = false;
                    }
                    break;

                case 3:
                    nodoP = grafo.BuscaNodo(p1);
                    if (nodoP != null)
                        bandA = true;
                    else band = false;
                    break;

                case 8:
                    p1 = e.Location;
                break;

            }
        }



private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if(e.Button.Equals(MouseButtons.Left) && opcion == 2 && bandA)
            {
                p2 = e.Location;
                band = true;
                Invalidate(false);
            }

            if (e.Button.Equals(MouseButtons.Left) && opcion == 3 && bandA)
            {
                band = false;
                bandF = false;
                bandI = true;
                nodoP.centro = e.Location;
                Invalidate();
            }
    }

The previous fragment exemplifies how (according to me) I manage the page, with g, gaux and the bmp to draw, thanks for your help:)