Using Aspose.Imaging for .NET you can easily convert from BMP(Bitmap Picture) to other formats...to JPEG2000 BMP to PNG BMP to APNG BMP to PSD BMP to DXF BMP to...
Using Aspose.Imaging for .NET library it is easy to convert to ICO(Windows icon) from other supported image formats...conversions are supported : APNG to ICO BMP to ICO DIB to ICO...