WeifenLuo.WinFormsUI.Docking.DockPane.GetFirstContent C# (CSharp) Method

        private IDockContent GetFirstContent(DockState dockState)
        {
            for (int i = 0; i < DisplayingContents.Count; i++)
            {
                IDockContent content = DisplayingContents[i];
                if (content.DockHandler.IsDockStateValid(dockState))
                    return content;
            }
            return null;
        }