Assembly: System.Drawing (in system.drawing.dll)
Return ValueAn element of the KnownColor enumeration, if the Color is created from a predefined color by using either the FromName method or the FromKnownColor method; otherwise, 0.
A predefined color is also called a known color and is represented by an element of the KnownColor enumeration. When the ToKnownColor method is applied to a Color structure that is created by using the FromArgb method, ToKnownColor returns 0, even if the ARGB value matches the ARGB value of a predefined color. ToKnownColor also returns 0 when it is applied to a Color structure that is created by using the FromName method with a string name that is not valid.
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.