ImageAttributes.SetColorKey Method (Color, Color)
Sets the color key for the default category.
Assembly: System.Drawing (in System.Drawing.dll)
This method sets the high and low color-key values so that a range of colors can be made transparent. Any color that has each of its three components (red, green, blue) between the corresponding components of the high and low color keys is made transparent.
An ImageAttributes object maintains color and grayscale settings for five adjustment categories: default, bitmap, brush, pen, and text. For example, you can specify a color key for the default category, a different color key for the bitmap category, and still a different color key for the pen category.
The default color-adjustment and grayscale-adjustment settings apply to all categories that do not have adjustment settings of their own. For example, if you never specify any adjustment settings for the pen category, the default settings apply to the pen category.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.