如何将EntityCollection <T>转换为List <T>

using System.Collections.Generic;
using System.Linq;

public static class EntityCollectionExtensions
{
    public static List<T> ToList<T>(this EntityCollection<T> entityCollection)
    {
        return entityCollection.Select(item => item).ToList();
    }
}

EntityCollection<T> entityCollection = new EntityCollection<T>();
List<T> list = entityCollection.ToList();