using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Net;

using System.Reflection;

namespace ConsoleApplication1

{

    class Program

    {

        static void Main(string[] args)

        {

            UserModel u = new UserModel();

            u.UserName = "jinshuai";

            u.Age = ;

           IdentityModel im = new IdentityModel();

          im=  ConvertType<PropertyMapAttribute,IdentityModel,UserModel>(u,im); 

          Console.WriteLine(im.userName);

          Console.WriteLine(im.age); 

          Console.Read();

        }

        static T2  ConvertType<T1,T2,T3>(T3 SourceObj,T2 DestObj)

        {

            Type imt = DestObj.GetType();

            Type ut = SourceObj.GetType();

            PropertyInfo[] Parray = imt.GetProperties();

            PropertyInfo[] UParray = ut.GetProperties();

            foreach (PropertyInfo p in Parray)

            {

                PropertyInfo propert = imt.GetProperty(p.Name);

                object[] atarray = p.GetCustomAttributes(typeof(T1), true);

                var data = atarray.FirstOrDefault();

                dynamic a = (T1)data;

                if (a != null)

                {

                    foreach (PropertyInfo Up in UParray)

                    {

                        if (a.DestName == propert.Name && Up.Name == a.SourceName)

                        {

                            propert.SetValue(DestObj, Up.GetValue(SourceObj, null), null);

                        }

                    }

                }

            }

            return DestObj;

        }

    }

    public class UserModel {

        public string UserName { get; set; }

        public int Age { get; set; }

    }

    public class IdentityModel

    {

        [PropertyMapAttribute(SourceName = "UserName", DestName = "userName")]

        public string userName { get; set; }

        [PropertyMapAttribute(SourceName = "Age", DestName = "age")]

        public int age { get; set; }    

    }

    [AttributeUsage( AttributeTargets.Property )]

    public class PropertyMapAttribute:Attribute

    {

        public string SourceName { get; set; }

        public string DestName { get; set; }

    }

}