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分享protected override void OnPaint(PaintEventArgs e)
{
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(
this.ClientRectangle, Color.White, Color.DodgerBlue,
System.Drawing.Drawing2D.LinearGradientMode.Vertical);
e.Graphics.FillRectangle(brush, this.ClientRectangle);
brush.Dispose();
}
protected override void OnSizeChanged(EventArgs e)
{
this.Invalidate();
}