title: Could not load file or assembly 'AutoMapper' or one of its dependencies
body: <p>I have this problem when I deploy, I really don't know how to solve it. Any idea?</p>
  
  <pre><code>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&amp; stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0
   System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark&amp; stackMark, Boolean forIntrospection) +416
    System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark&amp; 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
  </code></pre>
  
  <p>System.Web.Compilation.BuildManager.CompileGlobalAsax() +50
     System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +676</p>
  
  <pre><code> [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
  </code></pre>
  
  <p>Version Information: Microsoft .NET Framework Version:2.0.50727.5446; ASP.NET Version:2.0.50727.5420</p>