"FillRectangle" draws with a different color when DoubleBuffered

[phommy]

please test this:

        public Form1()
        {
            InitializeComponent();
            this.DoubleBuffered = true;
        }
 
        protected override void OnPaint(PaintEventArgs e)
        {
            e.Graphics.FillRectangle(new SolidBrush(BackColor), 0, 0, 50, 50);
            base.OnPaint(e);
        }
 

The color it draw with is not SystemColor.BackColor but a different one. I don't know if it's by design or a bug. Can I do something to FillRectangle with pure color when double-buffered?

thank you!

If the image below is absent, please see this

[tlhintoq]

'Backcolor' is a property of your form. You can set the Backcolor of your form to anything you like.

Try looking at your available choices..

Start typing Color bob = Color.FromKnownColor(KnownColor.
{Intellisense will popup here giving you a list}

To the best of my knowledge there is no such color designation as System.Backcolor

[phommy]

I'm sorry to say that's a foolish question. I found there's no business with "DoubleBuffer".
Under 16-bit color the backcolor of control is "GetNearestColor"ed when drawn by system, so the color is different with

e.Graphics.FillRectangle(new SolidBrush(BackColor)

thank you all the same