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Remoting desktop controlling program needs to transfer a bmp from server to client,to make good use of the bandwidth,reduce the size of the image.I want to reduce the color depth of a bmp.
How to convert a bmp of 24bpp,32bpp,even if 64bpp to a bmp of 8bppIndexed?

Create a bitmap with the desired color depth as the destination bitmap and copy the original image to it.
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create a copy of the bitmap and save it to a MemoryStream as a GIF image. GIF images are 8bpp.
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