How to create good object model?

Does anybody know how to create good object model?
Again and again I have to create different object models in various projects. I have to solve a lot of problems.
- Define all entities
- Create objects for it
- Define relations (ususlly i use SQL Databases)
- Define methods to load/edit/save/delete entities.
- Define methods to search and featch set of entities
- Define events for entities (fired when it change)
- the biggest problem is the events for collections. If i got the collection of entities for filter [FirstName = 'Sam'] i want to recieve event NewEntityAdded(), when new entity with FirstName='Sam' is created. But i want not to recieve event when that new entity's FirstName = 'Jack'.
Do anybody know good book or set of articles for such a questions?

Hi Facedown12,
Does the issue resolved based on the Tatynan's suggestion? If the issue persists, please post the detail information about
your issue, so that we can make further analysis.
Regards,
Katherine Xiong
Katherine Xiong
TechNet Community Support

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there is a good paper:
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