using System;

using System.Collections.Generic;

using System.Linq;

using System.Collections.Specialized;

using System.Configuration;

using System.Data;

using System.Data.SqlClient;

using System.Globalization;

using System.Reflection;

​

     public static class EXT {

​

        public static object DefaultValue(this Type type)

        {

            return type.IsValueType ? Activator.CreateInstance(type) : null;

        }

    }

​

​

   public class ExampleClass

    {

        public string Id { get; set; }

        public string Title { get; set; }

        public decimal Price { get; set; }

​

        public IEnumerable<PropertyInfo> GetDefaultProperty()

        {

            return from prop in GetType().GetProperties()

                          let value = prop.GetValue(this, null)

                          where !Equals(value, prop.PropertyType.DefaultValue())

                          select prop;

        }

    }

public class Program

{

​

​

    public static void Main()

    {  

        ExampleClass c = new ExampleClass();

​

            foreach (var item in c.GetDefaultProperty())

            {

                Console.WriteLine(item.Name);

            }

    }

}