Method 'Finalise' in type 'Glass.Mapper.Sc.IoC.DependencyResolver' ... does not have an implementation

Question

We were on 8.2.3 and I am trying to get our instance up to 9.3. I started with a vanilla 9.3 initial install and installed an update to apply our custom renderings, templates, etc. At the end of the installation I got the error below:

Method 'Finalise' in type 'Glass.Mapper.Sc.IoC.DependencyResolver' from assembly 'Glass.Mapper.Sc, Version=4.3.4.197, Culture=neutral, PublicKeyToken=null' does not have an implementation.

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.TypeLoadException: Method 'Finalise' in type 'Glass.Mapper.Sc.IoC.DependencyResolver' from assembly 'Glass.Mapper.Sc, Version=4.3.4.197, Culture=neutral, PublicKeyToken=null' does not have an implementation.

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:

[TypeLoadException: Method 'Finalise' in type 'Glass.Mapper.Sc.IoC.DependencyResolver' from assembly 'Glass.Mapper.Sc, Version=4.3.4.197, Culture=neutral, PublicKeyToken=null' does not have an implementation.]
Dkg.Web.App_Start.GlassMapperScCustom.CreateResolver() +0
Dkg.Web.App_Start.GlassMapperSc.Start() +11 (Object , Object ) +9
Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +484
Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain, Boolean failIfNotExists) +236 Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain) +22
Sitecore.Nexus.Web.HttpModule.Application_Start() +220
Sitecore.Nexus.Web.HttpModule.Init(HttpApplication app) +1145
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +580
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +165
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +267
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +341

[HttpException (0x80004005): Method 'Finalise' in type 'Glass.Mapper.Sc.IoC.DependencyResolver' from assembly 'Glass.Mapper.Sc, Version=4.3.4.197, Culture=neutral, PublicKeyToken=null' does not have an implementation.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +523
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +107 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +688

Answer 1

I know about 3 reasons that could be the issue:

• Check if you have maybe double .config files for Glass Mapper. If you had already some configs in your project and then you installed Glass from nuget, it will add its config again and you may see exceptions like that.
• You have old versions of Glass mapper dll files in your bin folder. Check all of them if they are correct (especially look at Glass.Mapper.dll).
• Some of your projects still reference old Glass.Mapper.Sc.Core nuget package instead of new Glass.Mapper.Sc.93.Core. Use "Manage nuget packages for your solutionoption and findGlass.Mapper.Sc.Core` in installed packages.