ActiveRecordStarter.Initialize( source, typeof(User) );

1.

ActiveRecordStarter.Initialize( source, typeof(Order),typeof(Product));

2

IConfigurationSource source = System.Configuration.ConfigurationManager.GetSection("activerecord") as     IConfigurationSource; 
Type[] paramTypes = new Type[3]; 
paramTypes[0] = typeof(User1); 
paramTypes[1] = typeof(Post); 
paramTypes[2] = typeof(Blog); 
ActiveRecordStarter.Initialize(source, paramTypes);

3

Assembly assembly = Assembly.Load("ARTest"); 
ActiveRecordStarter.Initialize(assembly, source);

  4.// 获取数据库连接配置
XmlConfigurationSource source = new XmlConfigurationSource(@"Config\ActiveRecord.xml");// 载入程序集中所有 ActiveRecord 类。
ActiveRecordStarter.Initialize(Assembly.GetExecutingAssembly(), source);// 这样可以一次初始化所有的程序集里面的类。