MVC
Web forms
Web forms Tutorials

Settings (change the default settings of the controls)

you can change the default settings of the controls by calling something like this:

Settings.AjaxList.MoreText = "show more results";
Settings.Lookup.OkText = "Choose";
Settings.Lookup.ClearButton = true;
Settings.MultiLookup.Fullscreen = true;

usually you would call this in Global.asax.cs Application_Start

Translating default texts

A function can be assigned to Settings.GetText, this function will receive 2 parameters (name of the control, and key of the text) and must return a string, this way you can return a different text depending on current UI culture:

Settings.GetText = (n, k) =>
     {     
         if (k == "CancelText") return "Cancel";
         if (k == "SearchText") return "Search";
         if (k == "MoreText") return "More results";
         if (n == "MultiLookup" && k == "Title")
             return "please select some items";  
         if (n == "Lookup" && k == "Title")
             return "please select an item";
         return "";
     };