passing value from master page.

I need to pass certain values from content page to master page?I have tried using the session object to store the value but it comes out as null in master page.Can someone throw somelight to that...Scenario is,
-i am getting some values from DB in say content page1.aspx.cs .I want to pass this value to the master page.master.cs.So that this value can be used to set up the style attributes from the master page..
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