//2.x 写法
<property name='proxyfactory.factory_class'>NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>//3.X写法
<property name='proxyfactory.factory_class'>NHibernate.Bytecode.DefaultProxyFactoryFactory, NHibernate</property>

public class Childpublic class Parent
{Public virtual Child Child｛get;set;｝
}    

Parent p=XXXXXXX;
If (p.Child is Child)
{
//do something
}

ISession session= GetSession();
string hql = "from table1 tab where DataTime between :a and :b";
IType[] itypes = new IType[] { NHibernateUtil.DateTime, NHibernateUtil.DateTime };
session().Delete(hql, new object[] { startDate, endDate }, itypes);

ISession session= GetSession();
string hql = "from table1 tab where DataTime between ? and ?";
IType[] itypes = new IType[] { NHibernateUtil.DateTime, NHibernateUtil.DateTime };
session().Delete(hql, new object[] { startDate, endDate }, itypes);

string hql = "delete from table1 tab where DataTime between ? and ?";
IType[] itypes = new IType[] { NHibernateUtil.DateTime, NHibernateUtil.DateTime };
IQuery q = session.CreateQuery(hql);
for (int i = 0; i < vals.Length; i++)
{q.SetParameter(i, vals[i], itypes[i]);
}
q.ExecuteUpdate();

string hql = "delete from table1 tab where DataTime between :start and :end";
IType[] itypes = new IType[] { NHibernateUtil.DateTime, NHibernateUtil.DateTime };
IQuery q = session.CreateQuery(hql);
q.SetDateTime(“start”,a);
q.SetDateTime(“end”, b);
q.ExecuteUpdate();

IQuery SetParameter(int position, object val, IType type);IQuery SetParameter(string name, object val, IType type);