Bmp to jpg/png in C#

Question

Is there any way to convert a bmp image to jpg/png without losing the quality in C#? Using Image class we can convert bmp to jpg but the quality of output image is very poor

Answer 1

Provided BitmapExtensions by jestro are great, I used them. However would like to show the corrected version - works for Image parent class which is more convenient as I think and provides a way to supply quality:

public static class ImageExtensions
{
    public static void SaveJpeg(this Image img, string filePath, long quality)
    {
        var encoderParameters = new EncoderParameters(1);
        encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, quality);
        img.Save(filePath, GetEncoder(ImageFormat.Jpeg), encoderParameters);
    }

    public static void SaveJpeg(this Image img, Stream stream, long quality)
    {
        var encoderParameters = new EncoderParameters(1);
        encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, quality);
        img.Save(stream, GetEncoder(ImageFormat.Jpeg), encoderParameters);
    }

    static ImageCodecInfo GetEncoder(ImageFormat format)
    {
        ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
        return codecs.Single(codec => codec.FormatID == format.Guid);
    }
}