Currently i have glass mapper v3 and in process of upgrading to latest glass mapper i.e. v4, however when i build the project its giving me following error.
Severity Code Description Project File Line Suppression State Error CS1705 Assembly 'Glass.Mapper.Sc.Mvc' with identity 'Glass.Mapper.Sc.Mvc, Version=4.2.1.188, Culture=neutral, PublicKeyToken=null' uses 'System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' which has a higher version than referenced assembly 'System.Web.Mvc' with identity 'System.Web.Mvc, Version=5.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'