Setting the Culture in ASP.NET

I have an asp:literal:

<asp:Literal id="language" OnClick="changeLangauge" Text="<%$ Resources:Translate, switchLanguage %>" runat="server"/> 

When it is clicked it switches the language:

public void ChangeLanguage(Object sender, EventArgs e) { string lang = langauge.Attribues["class"]; language.Attributes.Remove("class"); if (lang.Equals("fr-CA")) { language.Attributes.Add("class", "en-US"); Session["lang"] = "en-US"; } else { language.Attributes.Add("class", "fr-CA"); Session["lang"] = "fr-CA"; } } 

I have overrided InitializeCulture, to set the culture based on Session["lang"]. The problem is InitializeCulture gets called before ChangeLanguage. How do I get around this problem?

I have tried to get the class value from asp:Literal control from inside InitializeCulture like this:

public void InitializeCulture(..) { ... String selectedLanguage = Request.Form["language"] ... } 

but it always returns null.