C#

public class MainClass
{
  public virtual long MainKey {get; set;}
  public virtual SubClass SubInstance {get; set;}

  public class SubClass
  {
    public virtual long SubKey {get;set;}
  }
}

<class name="MainClass" table="Main">
  <id name="MainKey" column="MainId" type="Int64">
    <generator class="identity" />
  </id>
  <many-to-one name="SubInstance" class="MainClass+SubClass" Column="SubId"/>
</class>
<class name="MainClass+SubClass" table="Sub">
  <id name="SubKey" column="SubId" type="Int64">
    <generator class="identity" />
  </id>
</class>

moon_stick wrote:

Did you not even look at the link I sent you?!

moon_stick wrote:

I'm sure I should be flattered but given that Microsoft wrote the class, I'd probably believe their documentation over anything I have to say.

led mike wrote:

Are you not familiar with George?

George_George wrote:

It talks about the general thread safety rule