C # redraw button

 public  class ButtonX:Button     {                         protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)            {                base.OnPaint(e);                System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();                path.AddEllipse(0, 0, this.Width, this.Height);                this.Region = new Region(path);                            }            protected override void OnMouseEnter(EventArgs e)            {                Graphics g = this.CreateGraphics();                g.DrawEllipse(new Pen(Color.Blue), 0, 0, this.Width, this.Height);                g.Dispose();            }                  }

Then generate a solution. After the solution is generated, the toolbox will be as follows:

This component is a new button. You just need to drag it to the form,
This is simple. If you are not satisfied with the effect, you can draw any image.

C # redraw button