System.Drawing.Image.FromStream() "Parameter is not valid" on Windows XP

Question

The following works fine on my Windows 7 development machine, however when run on Windows XP I get and exception stating "Parameter is not valid" on the last line?

private string base64String = "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";

byte[] bytes = Convert.FromBase64String(base64String);
System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);
System.Drawing.Image b = System.Drawing.Image.FromStream(ms, false, false);

This base64 string string works fine on both operating systems. Its is also an icon, but smaller in size:

"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"

Answer 1

XP is truly getting long in the tooth. The one thing it is missing is version 1.10 of gdiplus.dll, the update to GDI+ that first shipped with Vista. Lots of fixes in that version, for one it now actually supports ImageFormat.Icon.

Your image data represents an .ico file. Use the Icon(Stream) constructor instead. You may still have a problem with the 24bpp icons, I have no way to check that anymore.