[A]ASP.master_default_master cannot be cast to [B]ASP.master_default_master. Type A originates from 'App_Web_default.master.28963a75.avoncllk, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' in the context 'Default' at location 'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\b33646a2\9a70f45b\App_Web_default.master.28963a75.avoncllk.dll'. Type B originates from 'App_Web_default.master.28963a75.uizouull, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' in the context 'Default' at location 'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\b33646a2\9a70f45b\App_Web_default.master.28963a75.uizouull.dll'. VM - Articles by