如何使用NHibernate模式生成更新数据库表模式？

var configuration = new Configuration();
configuration.Configure();
configuration.AddAssembly(typeof(MyEntity).Assembly);
var schemaExport = new SchemaExport(configuration);
schemaExport.Create(true, true);

var schemaUpdate = new SchemaUpdate(configuration);
schemaUpdate.Execute(true, true);

var schemaValidator = new SchemaValidator(configuration);
schemaValidator.Validate();