Rounded edges in button C# (WinForms)

Question

Hello, through some research around here and other sites, I\'ve made a roun

Answer 1

This is a tweak on TaW's answer to more easily tweak the borderRadius and borderThickness. If you get random white space between the border and the button background color, m needs to be tweaked.

public class RoundedButton : Button
{
  GraphicsPath GetRoundPath(RectangleF Rect, int radius)
  {
    float m = 2.75F;
    float r2 = radius / 2f;
    GraphicsPath GraphPath = new GraphicsPath();

    GraphPath.AddArc(Rect.X + m, Rect.Y + m, radius, radius, 180, 90);
    GraphPath.AddLine(Rect.X + r2 + m, Rect.Y + m, Rect.Width - r2 - m, Rect.Y + m);
    GraphPath.AddArc(Rect.X + Rect.Width - radius - m, Rect.Y + m, radius, radius, 270, 90);
    GraphPath.AddLine(Rect.Width - m, Rect.Y + r2, Rect.Width - m, Rect.Height - r2 - m);
    GraphPath.AddArc(Rect.X + Rect.Width - radius - m,
                   Rect.Y + Rect.Height - radius - m, radius, radius, 0, 90);
    GraphPath.AddLine(Rect.Width - r2 - m, Rect.Height - m, Rect.X + r2 - m, Rect.Height - m);
    GraphPath.AddArc(Rect.X + m, Rect.Y + Rect.Height - radius - m, radius, radius, 90, 90);
    GraphPath.AddLine(Rect.X + m, Rect.Height - r2 - m, Rect.X + m, Rect.Y + r2 + m);

    GraphPath.CloseFigure();
    return GraphPath;
  }

  protected override void OnPaint(PaintEventArgs e)
  {
    int borderRadius = 50;
    float borderThickness = 1.75f;
    base.OnPaint(e);
    RectangleF Rect = new RectangleF(0, 0, this.Width, this.Height);
    GraphicsPath GraphPath = GetRoundPath(Rect, borderRadius);

    this.Region = new Region(GraphPath);
    using (Pen pen = new Pen(Color.Silver, borderThickness))
    {
      pen.Alignment = PenAlignment.Inset;
      e.Graphics.DrawPath(pen, GraphPath);
    }
  }
}

Cheers!