Form.Icon Property
.NET Framework 4.5
Gets or sets the icon for the form.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
A form's icon designates the picture that represents the form in the taskbar as well as the icon that is displayed for the control box of the form.
This property will have no effect if FormBorderStyle is set to FixedDialog. In that case, the form will not display an icon.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.