Unable to generate a temporary class (result=1).error CS2001: Source file ＇．．．．．．

System.InvalidOperationException: Unable to generate a temporary class (result=1).
error CS2001: Source file 'C:\WINDOWS\TEMP\ug5v9uxt.0.cs' could not be found
error CS2008: No inputs specified
at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, 

CompilerParameters parameters, Evidence evidence)
at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[]

 xmlMappings, Type[] types, String defaultNamespace, 

Evidence evidence, CompilerParameters 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.FromMappings(XmlMapping[] mappings, Type type)
at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings)
at System.Web.Services.Protocols.XmlReturn.GetInitializers(LogicalMethodInfo[] methodInfos)
at System.Web.Services.Protocols.XmlReturnWriter.GetInitializers(LogicalMethodInfo[] methodInfos)
at System.Web.Services.Protocols.MimeFormatter.GetInitializers(Type type,

 LogicalMethodInfo[] methodInfos)
at System.Web.Services.Protocols.HttpServerType..ctor(Type type)
at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context,

 HttpRequest request, HttpResponse response, Boolean& abortProcessing)

 解决办法

winnt\temp目录给asp.net用户访问的权限，users要fullcontrol