Integrating Sitefinity CMS with our .Net Project

Hello, 

We have a WPF/ASp.Net Project (Event Management Project)  wherin the Event Manager has the option of building their own websites with all sorts of customisation.

Requirement :-

We would like to plugin Sitefinity CMS with our project.

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We are creating an Event1 & this event has multiple pages in
it.

When we try to create Event2 , it gets attached with the Event1.

 

Question is how do we isolate different Events

so each events have their own set of pages dispalyed separtely ??

Thanks for the Help in advance...