using System;

using System.Dynamic;

using System.Linq;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        dynamic expando = new ExpandoObject();

        expando.id = "1";

        expando.product_name = "some name";

        expando.product_category = "some category";

​

        Product p = FromExpando<Product>(expando);

        Console.WriteLine(p.Id);

        Console.WriteLine(p.ProductName);

        Console.WriteLine(p.ProductCategory);

    }

    public static T FromExpando<T>(ExpandoObject expando) where T : class, new()

    {

        if (expando == null) return null;

​

        var properties = typeof(T)

            .GetProperties()

            .Where(pi => pi.CanWrite && !pi.GetIndexParameters().Any())

            .ToDictionary(pi => pi.Name.ToLower());

​

        T obj = new T();

        foreach (var kvp in expando)

        {

            var name = kvp.Key.ToLower().Replace("_", "");

            var val = kvp.Value;

            if (val != null &&

                properties.TryGetValue(name, out PropertyInfo prop) &&

                prop.PropertyType.IsAssignableFrom(val.GetType()))

            {

                prop.SetValue(obj, val);

            }

        }

        return obj;

    }

}

​

public class Product

{

    public string Id { get; set; }

    public string ProductName { get; set; }

    public string ProductCategory { get; set; }

}

​