选择新的WPF项目时发生WPF设计器错误

Question

当我选择新的WPF项目时，出现以下错误。

Loading this assembly would produce a different grant set from other instances. (Exception from HRESULT: 0x80131401) 
    at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck) 
    at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache) 
    at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) 
    at System.Activator.CreateInstance(Type type, Boolean nonPublic) 
    at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) 
    at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) 
    at System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark) 
    at System.Activator.CreateInstance(String assemblyName, String typeName) 
    at System.AppDomain.CreateInstance(String assemblyName, String typeName) 
    at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName) 
    at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName) 
    at MS.Internal.Package.VSIsolationProviderService.CreateIsolationProvider(String identity, AssemblyReferenceProvider assemblyReferences, IEnumerable`1 assemblyFolders) 
    at MS.Internal.Providers.VSDesignerContext.GetIsolationProvider(IServiceProvider provider, IVsHierarchy hierarchy, AssemblyReferenceProvider assemblyReferences) 
    at MS.Internal.Providers.VSDesignerContext.Initialize(IServiceProvider provider, IVsHierarchy hierarchy, UInt32 itemid, Object docDataObj) 
    at MS.Internal.Providers.VSDesignerContext..ctor(IServiceProvider provider, IVsWindowFrame frame, Object docDataObj) 
    at MS.Internal.Providers.VSDesignerContext.GetContext(IServiceProvider services, IVsWindowFrame frame, Boolean createIfNotExist) 
    at MS.Internal.Designer.DesignerPane.InitializeDesigner() 

Answer 1

（从http://www.designasp.net/blog/en/post/2009/03/29/XAML-designer-Loading-this-assembly-would-produce-a-different-grant-set-from-other-instances-%28Exception-from-HRESULT-0x80131401%29.aspx）

如果你打开WPF编辑器时收到此错误，请尝试：

1. 打开Visual Studio的第二个实例，并尝试打开XAML。
2. 关闭所有.xaml和.xml文件，关闭Visual Studio，重新打开并打开.xaml文件。
3. 在工具 - >加载项管理器中禁用所有加载项
4. 在Visual Studio中“重置所有设置”。
5. 安装CLR补丁（KB963676），它应该有助于修复XAML设计器。有一个来自微软的已知反馈，声称这应该有所帮助。从这里下载（https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=16827&wa=wsignin1.0）。 * .msu是用于Windows Vista或Windows Server 2008的修补程序。用于Windows XP或Windows Server 2003的* .exe即使您使用的是64位计算机，由于Visual Studio 2008是32位的，因此仍然需要x86修补程序应用。
6. 卸载所有Silverlight工具，运行时，SDK，Expression Blend。之后，修复Visual Studio。
7. 重新安装Visual Studio和.NET Framework。

如果没有工作，您将不得不重新安装操作系统。