我们有一个正在运行的 Silverlight 3 项目。将目标框架更改为 Silverlight 4 后,应用程序将不再启动。它在生成的 InitializeComponent() 方法中的以下行中引发异常:
System.Windows.Application.LoadComponent(this, new System.Uri("/SLAppMain;component/App.xaml", System.UriKind.Relative));
这是异常(注意内部异常):
System.Windows.Markup.XamlParseException occurred
Message= [Line: 0 Position: 0]
LineNumber=0
LinePosition=0
StackTrace:
bei System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
InnerException: System.TypeLoadException
Message=Der Typ 'System.Security.AllowPartiallyTrustedCallersAttribute' konnte nicht aus der mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e -Assembly geladen werden.
StackTrace:
bei System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type)
bei System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
bei System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
bei System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg)
bei System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent)
bei System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean isDecoratedTargetSecurityTransparent)
bei System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
bei System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit)
bei System.Attribute.GetCustomAttributes(Assembly element, Type attributeType, Boolean inherit)
bei MS.Internal.XamlSchemaContext.ProcessXmlnsDefinitions(Assembly assembly, String assemblyName)
bei MS.Internal.XamlSchemaContext.EnsureManagedAssemblyAttributesLoaded()
InnerException:
问题在于 System.Security.AllowPartiallyTrustedCallersAttribute 类型不包含在 Silverlight 版本的 mscorlib.dll 中。
我不知道如何解决这个问题,也不知道在哪里寻找原因。有人遇到过这个问题吗?什么可能导致此错误?