The type initializer for 'Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment' threw an exception

问题

I am trying to use Windows Azure Caching to store sessions in a MVC4 application. I build a application following steps from Link but when i try to make object of DataCache using below code line.

DataCache cache = new DataCache("default");

Errors occurs:

Microsoft.WindowsAzure.ServiceRuntime.dll not found or version mismatched, I updated my Windows Azure Emulator version to 2.0.0 and install WindowsAzure.Caching package version 2.0.0.0 using NuGet package installer. Now the error changes to "The type initializer for 'Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment' threw an exception."

I am using Windows 8 with VS2012 and Windows Azure Emulator version 2.0.0.

I will grateful if anyone can help me on this.

InnerException
    Message: The type initializer for 'Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment' threw an exception.

    Source: Microsoft.WindowsAzure.ServiceRuntime

    Stack Trace:    at Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.get_IsAvailable()
       at Microsoft.ApplicationServer.Caching.AzureClientHelper.RoleUtility.IsAzureEnvironmentAvailable()

Stack Trace:    at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at Microsoft.ApplicationServer.Caching.DataCacheFactoryConfiguration.Initialize(String clientName)
   at Microsoft.ApplicationServer.Caching.DataCacheFactoryConfiguration..ctor()
   at Microsoft.ApplicationServer.Caching.DataCacheFactory..ctor()
   at Microsoft.ApplicationServer.Caching.DataCacheFactory.InitializeOrFetchSingletonFactoryInstance(String clientConfigurationName)
   at Microsoft.ApplicationServer.Caching.DataCache..ctor(String cacheName, String clientConfigurationName)
   at Microsoft.ApplicationServer.Caching.DataCache..ctor(String cacheName)
   at MvcWebRole.Controllers.HomeController.Index() in d:\Pankaj\Azure.Test\Caching.Sample\MvcWebRole\Controllers\HomeController.cs:line 15
   at lambda_method(Closure , ControllerBase , Object[] )
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)

回答1:

I experienced this when migrating from Azure SDK 2.3 to SDK 2.4.

I noticed the migration automatically fixed all references to the service runtime for my web and worker roles, i.e.

C:\Program Files\Microsoft SDKs\Windows Azure\.NET SDK\v2.3\ref\Microsoft.WindowsAzure.ServiceRuntime.dll

changed to:

C:\Program Files\Microsoft SDKs\Azure\.NET SDK\v2.4\ref\Microsoft.WindowsAzure.ServiceRuntime.dll

However any assemblies referenced from the web/worker roles that referenced this assembly didn't update so I had to do it manually.

In addition I had to update the web.config and app.config entries to reference 2.4.0.0

<dependentAssembly>
    <assemblyIdentity name="Microsoft.WindowsAzure.ServiceRuntime" publicKeyToken="31bf3856ad364e35" culture="neutral" />
     <bindingRedirect oldVersion="0.0.0.0-2.4.0.0" newVersion="2.4.0.0" />
</dependentAssembly>

回答2:

I had the same issue. The solution was to point all referenced Azure assemblies in every project to the same source (for me the dlls in the SDK folder). The NuGetManager copies the dlls into the main project path under packages and points the references to these dlls.

回答3:

I've solved a similar issue by adding this to App.config:

<startup useLegacyV2RuntimeActivationPolicy="true">
  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>

This is because, I believe, ServiceRuntime.dll (or one of its dependencies) is a "mixed-mode" assembly. A little more info about what that means, and the config lines above, can be found here: What does 'useLegacyV2RuntimeActivationPolicy' do in the .NET 4 config?

来源：https://stackoverflow.com/questions/16560053/the-type-initializer-for-microsoft-windowsazure-serviceruntime-roleenvironment