在网上找了很多关于对象转XML的，大多不支持匿名类转换，今天在stackoverflow找了一篇文章  但是有些许BUG  已经修复

public static class ObjectToXML
    {
        private static readonly Type[] WriteTypes = new[] {
        typeof(string), typeof(DateTime),typeof(decimal), typeof(Guid),
        };
        public static bool IsSimpleType(this Type type)
        {
            return type.IsPrimitive || WriteTypes.Contains(type) || type.IsEnum;
        }
        public static XElement ToXml(this object input)
        {
            return input.ToXml(null);
        }

        private static string GetXMLElementAttributeName(PropertyInfo info)
        {
            string attributeName = "";

            var attr = info.GetCustomAttributes(true);
            if (attr != null && attr.Length > 0)
            {
                
                foreach (var item in attr)
                {
                    if (item is XmlElementAttribute)
                    {
                        var temp = item as XmlElementAttribute;
                        attributeName = temp.ElementName;

                        
                    }
                    else if(item is XmlRootAttribute)
                    {
                        var temp = item as XmlRootAttribute;
                        attributeName = temp.ElementName;
                    }
                }
            }
            return attributeName;
        }

        private static object GetPropertyValue(object input, PropertyInfo info)
        {
            if (info.PropertyType.IsEnum)
            {
                return (int)info.GetValue(input);
            }
            return info.GetValue(input);
        }

        public static XElement ToXml(this object input, string element)
        {
            if (input == null)
                return null;

            if (string.IsNullOrEmpty(element))
                element = "object";

            element = XmlConvert.EncodeName(element);
            var ret = new XElement(element);

            if (input != null)
            {
                var type = input.GetType();
                var props = type.GetProperties();
                var elements = from prop in props
                               let name = XmlConvert.EncodeName(GetXMLElementAttributeName(prop) == "" ? prop.Name : GetXMLElementAttributeName(prop))
                               let val = GetPropertyValue(input,prop)
                               let value = prop.PropertyType.IsSimpleType()
                                    ? new XElement(name, val)
                                    : val.ToXml(name)
                               where value != null
                               select value;

                ret.Add(elements);
            }

            return ret;
        }
    }

调用：

var model = new {
   Name = "张三",
   Age = 18 
};

model.ToXml("RequestParameter").ToString();

记得引入命名空间