How to draw a rounded rectangle in c#

Question

I am using this code to make a rounded rectangle. But it only draws upper left and right corners of rectanlge , more it doest not complete the rectangle at lower part. How to make it complete and filled . What changes should I make ?

public static Bitmap DrawRoundedRectangle(Bitmap Image, Color BoxColor, int XPosition, int YPosition,         int Height, int Width, int CornerRadius)     {      Bitmap NewBitmap = new Bitmap(Image, Image.Width, Image.Height);      using (Graphics NewGraphics = Graphics.FromImage(NewBitmap))     {         using (Pen BoxPen = new Pen(BoxColor))         {             using (GraphicsPath Path = new GraphicsPath())             {                    Path.AddLine(XPosition + CornerRadius, YPosition, XPosition + Width - (CornerRadius * 2), YPosition);                     Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition, CornerRadius * 2, CornerRadius * 2, 270, 90);                   Path.AddLine(XPosition + Width, YPosition + CornerRadius, XPosition + Width, YPosition + Height - (CornerRadius * 2));                     Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 0, 90);                  Path.AddLine(XPosition + Width - (CornerRadius * 2), YPosition + Height, XPosition + CornerRadius, YPosition + Height);                    Path.AddArc(XPosition, YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 90, 90);                    Path.AddLine(XPosition, YPosition + Height - (CornerRadius * 2), XPosition, YPosition + CornerRadius);                     Path.AddArc(XPosition, YPosition, CornerRadius * 2, CornerRadius * 2, 180, 90);                      Path.CloseFigure();                      NewGraphics.DrawPath(BoxPen, Path);                  }               }           }          return NewBitmap;      } 

Answer 1

    public static GraphicsPath RoundedRect(Rectangle bounds, int radius)     {         int diameter = radius * 2;         Size size = new Size(diameter, diameter);         Rectangle arc = new Rectangle(bounds.Location, size);         GraphicsPath path = new GraphicsPath();          if (radius == 0)         {             path.AddRectangle(bounds);             return path;         }          // top left arc           path.AddArc(arc, 180, 90);          // top right arc           arc.X = bounds.Right - diameter;         path.AddArc(arc, 270, 90);          // bottom right arc           arc.Y = bounds.Bottom - diameter;         path.AddArc(arc, 0, 90);          // bottom left arc          arc.X = bounds.Left;         path.AddArc(arc, 90, 90);          path.CloseFigure();         return path;     } 

And you can make two extension methods for the Graphics type so you can use them as the usual Draw... and Fill... shape-drawing methods.

    public static void DrawRoundedRectangle(this Graphics graphics, Pen pen, Rectangle bounds, int cornerRadius)     {         if (graphics == null)             throw new ArgumentNullException("graphics");         if (pen == null)             throw new ArgumentNullException("pen");          using (GraphicsPath path = RoundedRect(bounds, cornerRadius))         {             graphics.DrawPath(pen, path);         }     }      public static void FillRoundedRectangle(this Graphics graphics, Brush brush, Rectangle bounds, int cornerRadius)     {         if (graphics == null)             throw new ArgumentNullException("graphics");         if (brush == null)             throw new ArgumentNullException("brush");          using (GraphicsPath path = RoundedRect(bounds, cornerRadius))         {             graphics.FillPath(brush, path);         }     } 

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Update 2020:

Recently I made my drawing libraries publicly available (NuGet). Feel free to explore the GraphicsExtensions class for more overloads (custom corner radius for each corners), and for other goodies.