To reproduce: -add RadDock with several tabbed documents; -add four ToolWindows to each side: left, top, right, bottom; Use the following code: public Form1() { InitializeComponent(); toolWindow1.DockState = Telerik.WinControls.UI.Docking.DockState.AutoHide; toolWindow2.DockState = Telerik.WinControls.UI.Docking.DockState.AutoHide; toolWindow3.DockState = Telerik.WinControls.UI.Docking.DockState.AutoHide; toolWindow4.DockState = Telerik.WinControls.UI.Docking.DockState.AutoHide; toolWindow1.AutoHide(); toolWindow2.AutoHide(); toolWindow3.AutoHide(); toolWindow4.AutoHide(); } When you run the project, you will notice that all of the ToolWindows are auto hidden and positioned to the left side which is wrong. Some other wrong behavior is when you try to dock again some of the ToolWindows after that, all of them are docked back to their initial positions.

Workaround: instead of using AutoHide() method, use the following code: Type type = this.radDock1.GetType(); MethodInfo methodInfo = type.GetMethod("CloseAutoHidePopup", BindingFlags.Instance | BindingFlags.NonPublic); methodInfo.Invoke(this.radDock1, null);