/// <summary>
 		/// Get the SQL string to drop this Constraint in the database.
 		/// </summary>
		/// <param name="dialect">The <see cref="Dialect.Dialect"/> to use for SQL rules.</param>
		/// <param name="defaultSchema"></param>
		/// <returns>
 		/// A string that contains the SQL to drop this Constraint.
 		/// </returns>
 		public override string SqlDropString(NHibernate.Dialect.Dialect dialect, string defaultSchema )		
		{
			// TODO: NH-421
 			return string.Format( "alter table {0} {1}", Table.GetQualifiedName( dialect, defaultSchema ),  dialect.GetDropForeignKeyConstraintString( Name ) );
 		}