Pen Class

public sealed class Pen

Public NotInheritable Class Pen

public ref class Pen sealed

[<SealedAttribute>]
type Pen = class end

Inheritance

Object    Pen

Pens are used to draw the outline of shapes, or to draw primitive lines and curves.

A Pen instance is defined by a Brush (possibly implicitly by a single color) that determines the color or texture of the pen, and a Width that determines the width of the pen. The LineJoin, MiterLimit, StartCap, and EndCap properties determine how the ends and joins of lines are drawn.

The following table illustrates the behavior of some properties of the Pen class:

Description	Image Example
LineJoin: Specifies how to join the consecutive line segments. Can be Miter, Bevel or Round. The example images demonstrate these join types from the top to the bottom. All examples use a 10 pixel wide pen.
StartCap and EndCap: Specify the style of the start and end points of an open figure. Can be Flat, Square, Round or Triangle. The example images demonstrate these cap types from the top to the bottom, using the same cap style at both ends. Please note that the only difference between Flat and Square styles is that the Flat style has the originally specified length, whereas the Square style extends the line by half of the pen width. All examples use a 10 pixel wide pen.
Brush: It allows setting a Brush explicitly, so the Pen can use not only a solid color but also a texture or any other brush. The example demonstrates a 10 pixel wide pen with a diagonal linear gradient brush using mirrored wrapping mode.

Reference