無法載入文件或程序集“AutoMapper”或其依賴項之一

我在部署時遇到這個問題，我真的不知道如何解決它。任何想法？

Server Error in '/' Application.
Could not load file or assembly 'AutoMapper' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

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.BadImageFormatException: Could not load file or assembly 'AutoMapper' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

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.

Assembly Load Trace: The following information can be helpful to determine why the assembly 'AutoMapper' could not be loaded.


=== Pre-bind state information ===
LOG: User = IIS APPPOOL\DefaultAppPool
LOG: DisplayName = AutoMapper
(Partial)
LOG: Appbase = file:///C:/inetpub/wwwroot/
LOG: Initial PrivatePath = C:\inetpub\wwwroot\bin
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\inetpub\wwwroot\web.config
LOG: Using host configuration file:C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/Temporary ASP.NET Files/root/e22c2559/92c7e946/AutoMapper.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/Temporary ASP.NET Files/root/e22c2559/92c7e946/AutoMapper/AutoMapper.DLL.
LOG: Attempting download of new URL file:///C:/inetpub/wwwroot/bin/AutoMapper.DLL.
ERR: Failed to complete setup of assembly (hr = 0x8013101b). Probing terminated.

Stack Trace: 


[BadImageFormatException: Could not load file or assembly 'AutoMapper' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.]
System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0
System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +416
 System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +166
 System.Reflection.Assembly.Load(String assemblyString) +35
 System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +190

[ConfigurationErrorsException: Could not load file or assembly 'AutoMapper' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +11224200
    System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +388
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +232
System.Web.Configuration.AssemblyInfo.get_AssemblyInternal() +48
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +210
System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath configPath, Boolean supportLocalization, String outputAssemblyName) +76
System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean isPrecompiledApp) +283

System.Web.Compilation.BuildManager.CompileGlobalAsax() +50 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +676

[HttpException (0x80004005): Could not load file or assembly 'AutoMapper' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.]
 System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +76
 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +1012
 System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager,     IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters) +1025

[HttpException (0x80004005): Could not load file or assembly 'AutoMapper' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.]
 System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11318198
 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +88
 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4348404

版本資訊：Microsoft .NET Framework 版本：2.0.50727.5446；ASP.NET 版本：2.0.50727.5420

應用程序池是為 .NET 2.0 配置的：

版本資訊：Microsoft .NET Framework 版本：2.0.50727.5446；ASP.NET 版本：2.0.50727.5420

部署的 AutoMapper 程序集是為 .NET 4.0 建構的：

“此程序集由比目前載入的執行時更新的執行時建構，無法載入。”

這不會一起工作。您可以通過將應用程序池切換到 .NET 4.0 來解決此問題。

嘗試更改 AppPool… 在 IIS 中右鍵點擊您的應用程序，管理應用程序 => 高級設置 => 更改池。asp.net v4 池為我工作…

引用自：https://stackoverflow.com/questions/8042493