Parse XML file in C#

/// <summary>
        /// Parse XML file
        /// </summary>
        /// <param name="filePath"></param>
        public Tuple<List<FieldImports>, bool> ParseXmlFile(string filePath)
        {
            var columnList = new List<FieldImports>();
            try
            {
                if (!File.Exists(filePath))
                {
                    throw new PersistenceValidationException("Validation Error",
                        new List<BrokenRule>
                            {
                                new BrokenRule(BrokenRuleEnum.Data.ToStringValue(), "FileUpload", "File not found.")
                            });
                }
                var xmlDoc = new XmlDocument();
                xmlDoc.Load(filePath);
                if (xmlDoc.DocumentElement != null)
                    foreach (XmlNode xmlNode in xmlDoc.DocumentElement)
                    {
                      
                        //column name
                        var columnsName = xmlNode.Name;
                        //column value
                        var value = xmlNode.InnerText;
                        var fieldImports = new FieldImports
                        {
                            ColumnName = columnsName,
                            ColumnValue = value
                        };
                        columnList.Add(fieldImports);
                    }
                return new Tuple<List<FieldImports>, bool>(columnList, false);
            }
            catch (XmlException)
            {
                throw new PersistenceValidationException("Validation Error", new List<BrokenRule>
                    {
                        new BrokenRule("InvalidXml", "Invalid Xml file")
                    });
            }
        }