Best way to make website for multiple languages

Resx:

http://msdn.microsoft.com/en-us/library/ms227427.aspx

http://dreamdotnet.blogspot.com/2007/01/tutorial-translating-aspnet-web.html

You can use resx files for multiple languages and use the ResXResourceWrite to update them (if you want users to be able to update the files: http://msdn.microsoft.com/en-us/library/system.resources.resxresourcewriter.aspx)

This solution is only good for static content. If you want to be able to translate content from the database (for example if you have products stored in your database, and you want that the description of the product to be multilingual too). In this case you'll need to change you DB Scheme in order to support multilingual content.

PS you can use GetLocalResourceObject("key") in order to retrieve values without using web controls.

If you're using MVC, see the following question: How to localize ASP.NET MVC application?

Sample code i have done using resource file add global.asax

 void Application_BeginRequest(Object sender, EventArgs e)
        {
            // Code that runs on application startup
            HttpCookie cookie = HttpContext.Current.Request.Cookies["CultureInfo"];
            if (cookie != null && cookie.Value != null)
            {
                System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(cookie.Value);
                System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo(cookie.Value);
            }
            else
            {
                System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("en");
                System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en");
            }
        }

Blog Article: How to create multilanguage website in Asp.net C#