Helper extension methods for creating a list of ASP.NET MVC SelectListItem with NHibernate LINQ

SelectListExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Web.Mvc;
using NHibernate;
using NHibernate.Linq;

public static class SelectListExtensions
{
    private static readonly PropertyInfo TextProperty = typeof(SelectListItem).GetProperty("Text");
    private static readonly PropertyInfo ValueProperty = typeof(SelectListItem).GetProperty("Value");

    public static IList<SelectListItem> SelectListItems<TEntity>(
        this IQueryable<TEntity> query,
        Expression<Func<TEntity, string>> text,
        Expression<Func<TEntity, string>> value)
    {            
        var param = Expression.Parameter(typeof(TEntity), "x");
        var projection = Expression.Lambda<Func<TEntity, SelectListItem>>(
            Expression.MemberInit(
                Expression.New(typeof(SelectListItem)),
                Expression.Bind(TextProperty, Expression.Invoke(text, param)),
                Expression.Bind(ValueProperty, Expression.Invoke(value, param))
            ), 
            param
        );
        return query.Select(projection).ToList();
    }

    public static IList<SelectListItem> SelectListItems<TEntity>(
        this ISession session,
        Expression<Func<TEntity, string>> text,
        Expression<Func<TEntity, string>> value)
    {
        return session.Query<TEntity>().SelectListItems(text, value);
    }
}

Usage.cs

// no filtering
var countries = session.SelectListItems<Country>(x => x.Name, x.Id.ToString());

// with filtering
var countries = session.Query<Country>().Where(x => x.Continent == "Europe").SelectListItems(x => x.Name, x => x.Id.ToString());