From http://stackoverflow.com/questions/5120317/dynamic-anonymous-type-in-razor-causes-runtimebinderexception/5670899#5670899

ReflectionExtensions

using System.Collections.Generic;
using System.ComponentModel;
using System.Dynamic;

namespace Core.Utils
{
    public static class ReflectionExtensions
    {
        public static ExpandoObject ToExpando(this object values)
        {
            if (values == null) return null;
            IDictionary<string, object> anonymousDictionary = new Dictionary<string, object>();
            anonymousDictionary.AddValues(anonymousDictionary);
            IDictionary<string, object> expando = new ExpandoObject();
            foreach (var item in anonymousDictionary)
                expando.Add(item);
            return (ExpandoObject)expando;
        }

        public static void AddValues(this IDictionary<string, object> dict, object values)
        {
            if (dict == null || values == null) return;
            foreach (PropertyDescriptor descriptor in TypeDescriptor.GetProperties(values))
            {
                object obj2 = descriptor.GetValue(values);
                dict.Add(descriptor.Name, obj2);
            }
        }

        public static IDictionary<string, object> ToDictionary(this object withProperties)
        {
            IDictionary<string, object> dict = new Dictionary<string, object>();
            if (withProperties == null)
            {
                return dict;
            }
            var properties = TypeDescriptor.GetProperties(withProperties);
            foreach (PropertyDescriptor property in properties)
            {
                dict.Add(property.Name, property.GetValue(withProperties));
            }
            return dict;
        }
    }
}