I'm developing a web part in SharePoint 2013 using VS2012. In this web part I'm trying to use third party dll controls like telerik but i face a problem :
Could not load file or assembly......
and the file .ascx.g.cs will be empty when add register line as bellow :
<%@ Register Tagprefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
I try to add dlls to gac and also try to add dlls to package but didn't fix my problem any suggestions??