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我有一个托管在中等信任环境（godaddy）中的应用程序。当我尝试使用该应用程序时，我遇到了定期发生的奇怪问题。 

Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

我已经阅读了许多其他关于在中等信任环境中运行的问题的帖子。我的问题真的是试图理解为什么它有时会起作用，有时我会收到上述信息。当错误发生时，它最终会自我纠正。显然，如果我回收修复的 IIS 也是如此。我希望他们是解决此问题的方法。

根据调用堆栈，它看起来与建立连接并尝试从我的程序集中加载 MetadataWorkspace 有关。我的 MetadataWorkspace 包含在我的 Web 应用程序的 App_Code 文件夹中。

部分调用栈：

System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessPermission.Demand()
   at System.Reflection.Assembly.VerifyCodeBaseDiscovery(String codeBase)
   at System.Reflection.Assembly.GetName(Boolean copiedName)
   at System.Reflection.Assembly.GetName()
   at System.Data.Metadata.Edm.DefaultAssemblyResolver.AssemblyComparer`1.Equals(T x, T y)
   at System.Collections.Generic.HashSet`1.AddIfNotPresent(T value)
   at System.Collections.Generic.HashSet`1.Add(T item)
   at System.Data.Metadata.Edm.DefaultAssemblyResolver.GetAllDiscoverableAssemblies()
   at System.Data.Metadata.Edm.DefaultAssemblyResolver.GetWildcardAssemblies()
   at System.Data.Metadata.Edm.MetadataArtifactLoaderCompositeResource.LoadResources(String    assemblyName, String resourceName, ICollection`1 uriRegistry, MetadataArtifactAssemblyResolver   resolver)
   at System.Data.Metadata.Edm.MetadataArtifactLoaderCompositeResource.CreateResourceLoader(String path, ExtensionCheck extensionCheck, String validExtension, ICollection`1 uriRegistry, MetadataArtifactAssemblyResolver resolver)
   at System.Data.Metadata.Edm.MetadataArtifactLoader.Create(String path, ExtensionCheck extensionCheck, String validExtension, ICollection`1 uriRegistry, MetadataArtifactAssemblyResolver resolver)
   at System.Data.EntityClient.EntityConnection.SplitPaths(String paths)
   at System.Data.EntityClient.EntityConnection.GetMetadataWorkspace(Boolean initializeAllCollections)
   at System.Data.Objects.ObjectContext.RetrieveMetadataWorkspaceFromConnection()
   at System.Data.Objects.ObjectContext..ctor(EntityConnection connection, Boolean isConnectionConstructor)
   at System.Data.Objects.ObjectContext..ctor(String connectionString, String defaultContainerName)

我有解决方法吗？

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