I created a new app with VS 2015 RC and the MVC template and without modifying any line of code I have this error:
Method not found: '!!0[] System.Array.Empty()'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.MissingMethodException: Method not found: '!!0[] System.Array.Empty()'.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[MissingMethodException: Method not found: '!!0[] System.Array.Empty()'.]
SAASApp.BundleConfig.RegisterBundles(BundleCollection bundles) in C:\Proyectos\SAASApp\SAASApp\App_Start\BundleConfig.cs:29
SAASApp.MvcApplication.Application_Start() in C:\Proyectos\SAASApp\SAASApp\Global.asax.cs:18
[HttpException (0x80004005): Method not found: '!!0[] System.Array.Empty()'.]
System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +483
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +176
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +350
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +305
[HttpException (0x80004005): Method not found: '!!0[] System.Array.Empty()'.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +661
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +96
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +189
First time it happens to me, so I am stuck at the moment
I had this situation on the production server while on development machine everything was OK.
Installing .NET Framework 4.6 on the target machine has fixed the problem.