'Declaration Public Property LayoutMode As DockedPaneLayoutMode
public DockedPaneLayoutMode LayoutMode {get; set;}
When set to Standard, which is the default value, the docked SplitPane instances are positioned along the edges of the DockManagerPanel around the System.Windows.Controls.ContentControl.Content.
When set to FillContainer, the innermost SplitPane, the last visible SplitPane in the Panes collection whose PaneLocation is one of the docked values (e.g DockedLeft, DockedRight, DockedTop or DockedBottom), fills the remaining space. This means that the SplitPane set to fill the available area may change as the ContentPanes are docked/undocked, closed and pinned/unpinned.
Note: If the System.Windows.Controls.ContentControl.Content property is set to a non-null value, the property will be coerced to Standard.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2