Hello,

I am upgrading my umbraco site from 4.11.10 version to 6.0.0 version. After upgrading to 6.0.0 version, i am getting below errors:

1)

2016-10-24 19:07:36,165 [33] INFO Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application starting 2016-10-24 19:07:36,287 [33] INFO Umbraco.Core.PluginManager - [Thread 1] Determining hash of code files on disk 2016-10-24 19:07:36,296 [33] INFO Umbraco.Core.PluginManager - [Thread 1] Hash determined (took 8ms) 2016-10-24 19:07:36,686 [33] INFO Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplicationStartupHandler, found 44 (took 382ms) 2016-10-24 19:07:39,396 [33] INFO Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.ICacheRefresher, found 0 (took 2488ms) 2016-10-24 19:07:39,397 [33] ERROR Umbraco.Core.UmbracoApplicationBase - [Thread 1] An unhandled exception occurred System.TypeLoadException: Could not load type 'Umbraco.Web.IApplicationEventHandler' from assembly 'umbraco, Version=1.0.4779.24225, Culture=neutral, PublicKeyToken=null'. at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes) at System.Reflection.RuntimeAssembly.GetExportedTypes() at Umbraco.Core.TypeFinder.GetTypesWithFormattedException(Assembly a) at Umbraco.Core.TypeFinder.GetTypes(Type assignTypeFrom, IEnumerable1 assemblies, Boolean onlyConcreteClasses) at Umbraco.Core.PluginManager.LoadViaScanningAndUpdateCacheFile[T](TypeList typeList, TypeResolutionKind resolutionKind, Func1 finder) at Umbraco.Core.PluginManager.ResolveTypes[T](Func`1 finder, TypeResolutionKind resolutionType, Boolean cacheResult) at Umbraco.Core.PluginManager.ResolveTypes[T](Boolean cacheResult) at Umbraco.Core.CoreBootManager.InitializeResolvers() at Umbraco.Web.WebBootManager.InitializeResolvers() at Umbraco.Core.CoreBootManager.Initialize() at Umbraco.Web.WebBootManager.Initialize() at Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e)

2) After deleting my unused dlls from Bin folder:

2016-10-24 19:12:13,483 [40] INFO Umbraco.Core.CoreBootManager - [Thread 17] Umbraco application starting 2016-10-24 19:12:13,613 [40] INFO Umbraco.Core.PluginManager - [Thread 17] Determining hash of code files on disk 2016-10-24 19:12:13,716 [40] INFO Umbraco.Core.PluginManager - [Thread 17] Hash determined (took 102ms) 2016-10-24 19:12:13,991 [40] INFO Umbraco.Core.PluginManager - [Thread 17] Completed resolution of types of umbraco.interfaces.IApplicationStartupHandler, found 0 (took 245ms) 2016-10-24 19:12:13,992 [40] ERROR Umbraco.Core.UmbracoApplicationBase - [Thread 17] An unhandled exception occurred System.TypeLoadException: Could not load type 'Umbraco.Web.IApplicationEventHandler' from assembly 'umbraco, Version=1.0.4779.24225, Culture=neutral, PublicKeyToken=null'. at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes) at System.Reflection.RuntimeAssembly.GetExportedTypes() at Umbraco.Core.TypeFinder.GetTypesWithFormattedException(Assembly a) at Umbraco.Core.TypeFinder.GetTypes(Type assignTypeFrom, IEnumerable1 assemblies, Boolean onlyConcreteClasses) at Umbraco.Core.PluginManager.LoadViaScanningAndUpdateCacheFile[T](TypeList typeList, TypeResolutionKind resolutionKind, Func1 finder) at Umbraco.Core.PluginManager.ResolveTypes[T](Func`1 finder, TypeResolutionKind resolutionType, Boolean cacheResult) at Umbraco.Core.PluginManager.ResolveTypes[T](Boolean cacheResult) at Umbraco.Core.CoreBootManager.InitializeApplicationEventsResolver() at Umbraco.Web.WebBootManager.InitializeApplicationEventsResolver() at Umbraco.Core.CoreBootManager.Initialize() at Umbraco.Web.WebBootManager.Initialize() at Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e) 2016-10-24 19:12:24,166 [40] INFO Umbraco.Core.UmbracoApplicationBase - [Thread 30] Application shutdown. Reason: InitializationError

Please help me if possible.

Thanks, Dhiren