System.Xml.XPath.XPathNavigator.AppendChild C# (CSharp) Method

        public virtual XmlWriter AppendChild()
        {
            throw new NotSupportedException();
        }

        private static bool ProcessItemGroupNode(XPathNavigator nav)
        {
            try
            {
                if (nav.MoveToChild("StyleCopTreatErrorsAsWarnings", "http://schemas.microsoft.com/developer/msbuild/2003"))
                {
                    if (nav.Value == "false")
                    {
                        nav.ReplaceSelf("<StyleCopTreatErrorsAsWarnings>true</StyleCopTreatErrorsAsWarnings>");
                    }
                    else
                    {
                        nav.ReplaceSelf("<StyleCopTreatErrorsAsWarnings>false</StyleCopTreatErrorsAsWarnings>");
                    }
                }
                else
                {
                    nav.AppendChild("<StyleCopTreatErrorsAsWarnings>true</StyleCopTreatErrorsAsWarnings>");
                }

                return true;
            }
            catch
            {
                return false;
            }
        }