Cannot define a class or member that utilizes "dynamic" because the compiler required type 'System.Runtime.CompilerServices.DynamicAttribute' cannot be found.
and Possible Solutions
Web deployment task failed. (Unable to preform the operation ("Create File") for the specified directory ("csc.exe"). This can occur if the server administrator has not authorized this operation for the user credentials you are using.
No assembly found containing a Startup or [AssemblyName].Startup class. To disable OWIN startup discovery, add the appSetting owin:AutomaticAppStartup with a value of "false" in your web.config.
A generic error occurred in GDI+
To many characters in character literal