.NET Framework 4.6 and 4.5
Gets or sets the space between controls.
member Margin : Padding with get, set
Controls receive default values for Margin that are reasonably close to Windows user interface guidelines. Some adjustments might still be necessary for particular applications.
Setting the Margin property on a docked control has no effect on the distance of the control from the the edges of its container.
Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1