string path = "c:\\mm.xml";
            Assembly assembly = Assembly.LoadFile("c:\\JRJ.XTrend.Theme.dll");
            XElement root = new XElement("Types", assembly.GetTypes().Select(x => new XElement("TypeName",x.Name)));
            root.Save(path);

------解决方案--------------------

举例
C# code

            string path = "c:\\mm.xml";
            Assembly assembly = Assembly.LoadFile("c:\\JRJ.XTrend.Theme.dll");            
            XElement root = new XElement("Types", assembly.GetTypes().Select(x => new XElement("Type",
                new XAttribute("Name",x.Name),
                new XElement("Methods",x.GetMethods().Select(m=>new XElement("Method",new XAttribute("Name",m.Name)))))));
            root.Save(path);