怎么改变dockpanel 的主PANEL的颜色？（具体见图）

Answer 1

 AutoHideStripSkin autoHideSkin = new AutoHideStripSkin();
                autoHideSkin.DockStripGradient.StartColor = Color.AliceBlue;
                autoHideSkin.DockStripGradient.EndColor = Color.Blue;
                autoHideSkin.DockStripGradient.LinearGradientMode = System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal;
                autoHideSkin.TabGradient.StartColor = SystemColors.Control;
                autoHideSkin.TabGradient.EndColor = SystemColors.ControlDark;
                autoHideSkin.TabGradient.TextColor = SystemColors.ControlText;
                autoHideSkin.TextFont = new Font("Showcard Gothic", 10);                dockPanel.Skin.AutoHideStripSkin = autoHideSkin;                DockPaneStripSkin dockPaneSkin = new DockPaneStripSkin();
                dockPaneSkin.DocumentGradient.DockStripGradient.StartColor = Color.Red;
                dockPaneSkin.DocumentGradient.DockStripGradient.EndColor = Color.Pink;                dockPaneSkin.DocumentGradient.ActiveTabGradient.StartColor = Color.Green;
                dockPaneSkin.DocumentGradient.ActiveTabGradient.EndColor = Color.Green;
                dockPaneSkin.DocumentGradient.ActiveTabGradient.TextColor = Color.White;                dockPaneSkin.DocumentGradient.InactiveTabGradient.StartColor = Color.Gray;
                dockPaneSkin.DocumentGradient.InactiveTabGradient.EndColor = Color.Gray;
                dockPaneSkin.DocumentGradient.InactiveTabGradient.TextColor = Color.Black;                dockPaneSkin.TextFont = new Font("SketchFlow Print", 10);                dockPanel.Skin.DockPaneStripSkin = dockPaneSkin;