PluralizationService + Extension Methods = AWESOME

PluralizationExtensions.cs

using System;
using System.Data.Entity.Design.PluralizationServices;
using System.Globalization;
using System.Text;

namespace Modelio.Core
{
    public static class StringExtensions
    {
        public static string Pluralize(this string source)
        {
            if (String.IsNullOrEmpty(source))
                throw new ArgumentException("Source is required.", "source");

            PluralizationService pluralService = PluralizationService.CreateService(CultureInfo.CurrentCulture);

            if (pluralService.IsPlural(source))
                return source;

            return pluralService.Pluralize(source);
        }

        public static string Singularize(this string source)
        {
            if (String.IsNullOrEmpty(source))
                throw new ArgumentException("Source is required.", "source");

            PluralizationService pluralService = PluralizationService.CreateService(CultureInfo.CurrentCulture);

            if (pluralService.IsSingular(source))
                return source;

            return pluralService.Singularize(source);
        }
    }
}