hMailServer.Administrator.ucDiagnostics.DisplayResults C# (CSharp) Method

        private void DisplayResults(hMailServer.DiagnosticResults results)
        {
            treeResults.Nodes.Clear();
             _resultString = "";

             for (int i = 0; i < results.Count; i++)
             {
            hMailServer.DiagnosticResult result = results.get_Item(i);

            int imageIndex = result.Result ? 1 : 0;

            _resultString += "Test: " + result.Name + "\r\n";

            TreeNode node = treeResults.Nodes.Add(result.Name, result.Name, imageIndex, imageIndex);
            node.ToolTipText = result.Description;

            string [] subItems = Microsoft.VisualBasic.Strings.Split(result.ExecutionDetails, "\r\n", -1, Microsoft.VisualBasic.CompareMethod.Text);

            foreach (string subItem in subItems)
            {
               if (subItem.Length == 0)
                  continue;

               int subImageIndex = subItem.Contains("ERROR:") ? 0 : 1;

               _resultString += subItem + "\r\n";

               node.Nodes.Add(subItem, subItem, subImageIndex, subImageIndex);
            }

            _resultString += "\r\n";

            Marshal.ReleaseComObject(result);
             }

             treeResults.ExpandAll();
        }