private void PopulateChildrenTreeNode()

in src/Desktop/UIAutomation/TreeWalkers/TreeWalkerForLive.cs [106:160]
47 lines of code
5 McCabe index (conditional complexity)

        private void PopulateChildrenTreeNode(A11yElement rootNode, int startId)
        {
            int childId = startId;

            IUIAutomationTreeWalker walker = A11yAutomation.GetTreeWalker(this.WalkerMode);
            IUIAutomationElement child = (IUIAutomationElement)rootNode.PlatformObject;

            if (child != null)
            {
                try
                {
                    child = walker.GetFirstChildElement(child);
                }
#pragma warning disable CA1031 // Do not catch general exception types
                catch (Exception ex)
                {
                    ex.ReportException();
                    child = null;
                    System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
                }
#pragma warning restore CA1031 // Do not catch general exception types

                while (child != null)
                {
#pragma warning disable CA2000 // childNode will be disposed by the parent node
                    // Create child without populating basic property. it will be set all at once in parallel.
                    var childNode = new DesktopElement(child, true, false)
                    {
                        UniqueId = childId++
                    };
#pragma warning restore CA2000 // childNode will be disposed by the parent node

                    rootNode.Children.Add(childNode);

                    childNode.Parent = rootNode;
                    childNode.TreeWalkerMode = this.WalkerMode;

                    this.Elements.Add(childNode);
                    try
                    {
                        child = walker.GetNextSiblingElement(child);
                    }
#pragma warning disable CA1031 // Do not catch general exception types
                    catch (Exception ex)
                    {
                        ex.ReportException();
                        child = null;
                        System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
                    }
#pragma warning restore CA1031 // Do not catch general exception types
                }
            }

            Marshal.ReleaseComObject(walker);
        }