to set the peroperty u have to the following.
Let say the class for ur master page is Master1
Create a selectedindexchanged for the drop down in ur page
then
Master1 ms1 = this.Master;
ms1.property = ...
here u set the property.
Then create the following event on the master page
protected void Page_PreRender(object sender, EventArgs e)
{
--add the code u want according to ur property... if ur asking why prerender, coz this event fires after the selectedindexchanged like this giving the chance to set ur property on ur master page.
}
Hope this helps
Regards
Ramzi
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