How do I convert rgb to hsv

See more:

C#

Sorry,I need to correct my question.

Now I use below code to convert.

public static void ColorToHSV(Color color, out double hue, out double saturation, out double value)
{
int max = Math.Max(color.R, Math.Max(color.G, color.B));
int min = Math.Min(color.R, Math.Min(color.G, color.B));
hue = color.GetHue();
saturation = (max == 0) ? 0 : 1d - (1d * min / max);
value = max / 255d;
}

How to show that in "PictureBox" ??
Sorry, I'm a novice.