When a beginner who has VB6 experience first time opens .NET and just going about making a form up he/she could notice there is no Line in the .NET toolbox. What happened, where did it go? There is a difference from VB6 forms that Windows Forms .NET does not support the Line control. The Line class is based on System.Drawing namespace that provides access to GDI+ basic graphics functionality. A Line control is a graphical control that displays a horizontal, vertical, or diagonal one-pixel-wide line that can't be changed directly. The Line control can be changed dynamically at run time. The control class Line that is implemented in both languages (VB.Net and C#) is derived from System.Windows.Forms.Control. It overrides the OnPaint method to draw itself. The class will draw the line depending on its properties.