(...) doesn't exist in the current context - Gradient and others brushes

Question

I saw a way to make a form's background color Gradient.

That was done by a GradientBrush but when I try that, it says it doesn't exist.

I wrote like this:

GradientBrush something = New GradientBrush();

In the output window I see the "doesn't exist in the current context" error.

Answer 1

In a winforms Form you could do this:

using  System.Drawing.Drawing2D;
...
...

private void Form1_Paint(object sender, PaintEventArgs e)
{
    using (LinearGradientBrush br = new
            LinearGradientBrush(Form1.ClientRectangle, Color.Wheat, Color.DimGray, 0f))
        e.Graphics.FillRectangle(br, Form1.ClientRectangle);
}

To get rid of flicker set the form to DoubleBuffered = true;

For more colors use the multicolor overload of the LinearGradientBrush! For an example see here!

If the background is fixed you may consider creating a Bitmap with the gradient. Perfect if the user will not resize the form..:

Bitmap form1Back = new Bitmap(form1.ClientSize.Width, form1.ClientSize.Height);
using (Graphics G = Graphics.FromImage(form1Back))
using (LinearGradientBrush br = new 
       LinearGradientBrush( form2.ClientRectangle, Color.Wheat, Color.DimGray, 0f))
    G.FillRectangle(br, form2.ClientRectangle);
form1.BackgroundImage = form1Back;