UICulture set in the content page will be applied to the Master page.

Or

It can be set in web.config
<configuration>
   <system.web>
      <globalization culture="auto" uiCulture="auto" />
</system.web>
</configuration>

thank u for reply

ok i'll describe my situation

i have one master page for all aspx pages in my project. this master page has a dropdownlist control(postback is enabled) where users can pick up allowed languages.
so i want to set up CultureInfo and UICulture during tha application is running.

in the Page u can override some methods like InitializeCulture() to set up CultureInfo and UICulture or in Page_PreInit(), but master page has no access to this methods.

only the one way i know is to override the method

in global.acax class
in .netframework 1.1 i could use Session to save user language, but framework 2.0 do not have access to Session.
so i have to use Cookie or userprofile but it does not look user friendly

is any other possibilities to do that in master page?

Here is one possible solution

UiCulure need to set very early and it can be done by overriding the InitializeCulture() method of page class.
But Master page can not overridde it .

So problem will be solved if a Page base class is created and all the content pages will be inherited that base class. And in the base class you can set the UiCulture as follows.