Add Contacts to perticular user as a admin

Hi ,

I want to login as an organization admin in exchange server and i want to add some list of contacts to perticular user and also i want to add some calendar events to that user. I will give one example

As a admin of the organization lets assume an email as admin@myorganization.com and logged into powershell

then i have some emails with in organization as user1@myorganization.com , user2@myorganization.com ,User3@myorganization.com .

I want to add only contacts to user1@myorganization.com . How can i do this in powershell or c#?? Can any one help on this?