Built a new Windows 8.1 Pro PC just for web dev, put VS 2013 on, new asp 4.5 project, and ran the same 'Install-Package...' in PM as has been working fine on my other PC's to install 7.0.4 but it blows up on run. As a test, I installed the old version automatically w/WebMatrix (not sure exactly which version, 6.x?) and it runs fine.

When the new version tanks, it throws this, which I don't know what it means, anyone know?

Server Error in '/' Application.

Could not load types from assembly umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null, errors: Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.Editors.ContentPostValidateAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Could not load type 'System.Web.Http.Controllers.IControllerConfiguration' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForContentAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FileUploadCleanupFilterAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'.

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.Reflection.ReflectionTypeLoadException: Could not load types from assembly umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null, errors: Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.Editors.ContentPostValidateAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Could not load type 'System.Web.Http.Controllers.IControllerConfiguration' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForContentAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FileUploadCleanupFilterAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'.

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:

[ReflectionTypeLoadException: Could not load types from assembly umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null, errors: Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.Editors.ContentPostValidateAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Could not load type 'System.Web.Http.Controllers.IControllerConfiguration' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForContentAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FileUploadCleanupFilterAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. ] Umbraco.Core.TypeFinder.GetTypesWithFormattedException(Assembly a) +383 Umbraco.Core.TypeFinder.GetClasses(Type assignTypeFrom, IEnumerable1 assemblies, Boolean onlyConcreteClasses, Func2 additionalFilter) +332 Umbraco.Core.TypeFinder.FindClassesOfType(IEnumerable1 assemblies, Boolean onlyConcreteClasses) +62 Umbraco.Core.TypeFinder.FindClassesOfType(IEnumerable1 assemblies) +45 Umbraco.Core.<>c_DisplayClass411.<ResolveTypes>b__40() +60 Umbraco.Core.PluginManager.LoadViaScanningAndUpdateCacheFile(TypeList typeList, TypeResolutionKind resolutionKind, Func1 finder) +46 Umbraco.Core.PluginManager.ResolveTypes(Func1 finder, TypeResolutionKind resolutionType, Boolean cacheResult) +2254 Umbraco.Core.PluginManager.ResolveTypes(Boolean cacheResult, IEnumerable1 specificAssemblies) +149 Umbraco.Core.CoreBootManager.InitializeApplicationEventsResolver() +46 Umbraco.Web.WebBootManager.InitializeApplicationEventsResolver() +5 Umbraco.Core.CoreBootManager.Initialize() +257 Umbraco.Web.WebBootManager.Initialize() +18 Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e) +89 Umbraco.Core.UmbracoApplicationBase.ApplicationStart(Object sender, EventArgs e) +9

[HttpException (0x80004005): Could not load types from assembly umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null, errors: Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.Editors.ContentPostValidateAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Could not load type 'System.Web.Http.Controllers.IControllerConfiguration' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForContentAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FileUploadCleanupFilterAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. ] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +9905689 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +336 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Could not load types from assembly umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null, errors: Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.Editors.ContentPostValidateAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Could not load type 'System.Web.Http.Controllers.IControllerConfiguration' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForContentAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.EnsureUserPermissionForMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FileUploadCleanupFilterAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. Exception: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute'. Assembly: 'umbraco, Version=1.0.5161.21058, Culture=neutral, PublicKeyToken=null'. ] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9885044 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34009