asp.net user control with multiple content area

In this website and some other websites there are topics about creating an asp.net user control which has a content placeholder or content area so you can put whatever you like inside your own user control. It will be like this :

<someprefix:yourcontrolname runat="server"> 
   <content>
   //plain text or complicated control can be here
   </content>
</someprefix:yourcontrolname>

But how can I create one with multiple content area like this one :

<someprefix:yourcontrolname runat="server"> 
   <content1>
   //plain text or complicated control can be here
   </content1>
   <content2>
   //plain text or complicated control can be here
   </content2>
</someprefix:yourcontrolname>