using System;

using System;

using System.Collections.Generic;

using System.Linq;

​

  public static class ExtenstionArray

    {

        public static string ToRequestContent<T>(this T model) {

            var list = model.GetType().GetProperties()

                   .Select(x => new

                   {

                       val = x.GetValue(model).ToString(),

                       name = x.Name

                   })

                   .Select(z => string.Join("=", z.name, z.val));

​

            return  "&"+ string.Join("&", list);

        }

  }

   class User

    {

        public string Name { get; set; }

        public string SurrName { get; set; } 

    }

​

    class Book

    {

        public int Id { get; set; }

        public string Title { get; set; }

    }

​

​

public class Program

{

    public static void Main()

    {

        User u = new User() { Name = "test", SurrName = "aa" };

        Book b = new Book() { Id = 134, Title = "aass" };

        Console.WriteLine( u.ToRequestContent());

        Console.WriteLine( b.ToRequestContent());

    }

}