Could not load file or assembly ‘xxxx’ or one of its dependencies. An attempt was made to load a program with an incorrect format.

Server Error in ‘/’ Application.

Could not load file or assembly ‘Gma.QrCodeNet.Encoding’ or one of its dependencies. 系统找不到指定的文件。

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.IO.FileNotFoundException: Could not load file or assembly ‘Gma.QrCodeNet.Encoding’ or one of its dependencies. 系统找不到指定的文件。

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 ‘Gma.QrCodeNet.Encoding’ could not be loaded.

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Stack Trace:

[FileNotFoundException: Could not load file or assembly 'Gma.QrCodeNet.Encoding' or one of its dependencies. 系统找不到指定的文件。]

[FileNotFoundException: Could not load file or assembly 'Gma.QrCodeNet.Encoding, Version=0.4.0.0, Culture=neutral, PublicKeyToken=e8a75d24b142be49' or one of its dependencies. 系统找不到指定的文件。]
   System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
   System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +39
   System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks) +132
   System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +144
   System.Reflection.Assembly.Load(String assemblyString) +28
   System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46

[ConfigurationErrorsException: Could not load file or assembly 'Gma.QrCodeNet.Encoding, Version=0.4.0.0, Culture=neutral, PublicKeyToken=e8a75d24b142be49' or one of its dependencies. 系统找不到指定的文件。]
   System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +618
   System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +209
   System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +130
   System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178
   System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +94
   System.Web.Compilation.BuildManager.CallPreStartInitMethods() +332
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +677

[HttpException (0x80004005): Could not load file or assembly 'Gma.QrCodeNet.Encoding, Version=0.4.0.0, Culture=neutral, PublicKeyToken=e8a75d24b142be49' or one of its dependencies. 系统找不到指定的文件。]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9088956
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +256

经过一番折腾排查未找到导致无法加载dll文件原因，客户说在美国的云服务器可以正常运行，最后忽视应用池开启32位。改为false 再次访问已经可以打开网站

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