IUserType for SQL datetime2

DateTime2UserType.cs

using System;
using System.Data;
using NHibernate;
using NHibernate.SqlTypes;
using NHibernate.UserTypes;

namespace Infrastructure.Data.NHibernate.UserTypes
{
    public class DateTime2UserType : IUserType
	{
		#region Equals member

		bool IUserType.Equals(object x, object y)
		{
			if (x == null) return false;
			return x.Equals(y);
		}

		#endregion

		#region IUserType Members

		public object Assemble(object cached, object owner)
		{
			return cached;
		}

		public object DeepCopy(object value)
		{
			return value == null ? (object) null : new DateTime(((DateTime)value).Ticks);
		}

		public object Disassemble(object value)
		{
			return value;
		}

		public int GetHashCode(object x)
		{
			return x.GetHashCode();
		}

		public bool IsMutable
		{
			get { return false; }
		}

		public object NullSafeGet(IDataReader reader, string[] names, object owner)
		{
			var index = reader.GetOrdinal(names[0]);
			if (reader.IsDBNull(index))
			{
				return null;
			}
            return (DateTime)reader[index];			
		}

		public void NullSafeSet(IDbCommand cmd, object value, int index)
		{
			if (value == null || value == DBNull.Value)
			{
			    NHibernateUtil.DateTime2.NullSafeSet(cmd, null, index);
			}
			else
			{
                NHibernateUtil.DateTime2.Set(cmd, value, index);
			}
		}

		public object Replace(object original, object target, object owner)
		{
			return original;
		}

		public Type ReturnedType
		{
			get { return typeof(DateTime); }
		}

		public SqlType[] SqlTypes
		{
			get { return new[] { new SqlType(DbType.DateTime2) }; }
		}

		#endregion
	}
}