Hello I'm beggining with AjaxControlToolkit but my problema is that I can't find nothing about the web.config,
I have downloaded an example that is working. but has and old ajaxcontroltoolkit.dll, but If i change with an ajaxcontroltoolkit for asp.net 4, I get an error.
In the example web.config I have several lines refering the ajaxcontroltoolkit versión 3.5.
I have read in the https://ajaxcontroltoolkit.codeplex.com/
but I can't find nothing about web.config.