FileNotFoundException, Could not find file 'C:\WINDOWS\TEMP\wpbzwlwo.dll'.

今日服務異常器拋一怪異問題。 在Xml序列化時提示：FileNotFoundException, Could not find file 'C:\WINDOWS\TEMP\wpbzwlwo.dll'.

    Stack trace:    at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)   at Microsoft.CSharp.CSharpCodeGenerator.FromFileBatch(CompilerParameters options, String[] fileNames)   at Microsoft.CSharp.CSharpCodeGenerator.FromSourceBatch(CompilerParameters options, String[] sources)   at Microsoft.CSharp.CSharpCodeGenerator.System.CodeDom.Compiler.ICodeCompiler.CompileAssemblyFromSourceBatch(CompilerParameters options, String[] sources)   at System.CodeDom.Compiler.CodeDomProvider.CompileAssemblyFromSource(CompilerParameters options, String[] sources)   at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence)   at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies)   at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence)   at System.Xml.Serialization.XmlSerializer.GenerateTempAssembly(XmlMapping xmlMapping, Type type, String defaultNamespace)   at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)   at System.Xml.Serialization.XmlSerializer..ctor(Type type)   at SolutionName.CommonClassname.XmlHelper.Serialize[T](T entity)   at SolutionName.Bizprocess.Classname.Methodname(Int32 paramter) 

經網上查閱， 原來這是個伺服器執行許可權問題。 網站進程由inetinfo.exe以管理員權限建立， w3wp啟動時會附加這個網站(window station)運行，但它不是一個Console process，當子進程csc.exe開始處理請求時， 會使用預設的window station Service-0x0-luid$ 重新建立Console information ，導致運行許可權不足。

因此，可以通過配置應用程式集區標識設定Administrator 群組來解決這個問題。