我想提高我的Xamarin.Forms UWP应用程序的性能，因为它在发布模式下非常慢（“.NET native”选中）。所以我在PCL项目的汇编级别应用XAMLC：
[assembly: XamlCompilation (XamlCompilationOptions.Compile)]
namespace MyApp
{
}
但是使用此属性我收到运行时错误：
“未找到方法：'无效 Xamarin.Forms.Xaml.Internals.SimpleValueTargetProvider..ctor（System.Object的[]）”“。
根据这个：
SimpleValueTargetProvider类有两个版本：
我使用Xamarin.Forms 2.3.3.163-pre3所以我在我的项目中使用第二个版本（当我导航到Xamarin.Forms.Xaml.Internals中的SimpleValueTargetProvider时，我可以看到带有2个参数的构造函数）。我的理解是，显然“某事”仍在调用SimpleValueTargetProvider 1.5.0.0，但我不知道它是什么。
我删除了所有第三方组件，但没有帮助。我使用了融合日志来了解发生了什么，但这就是我得到的（说实话我不知道这是否与我面临的问题有关）：
> *** Assembly Binder Log Entry (10/26/2016 @ 9:09:42 PM) ***
>
> The operation failed. Bind result: hr = 0x80070002. The system cannot
> find the file specified.
>
> Assembly manager loaded from:
> C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll Running under
> executable C:\Program Files (x86)\Microsoft Visual
> Studio\VS15Preview\Common7\IDE\devenv.exe
> --- A detailed error log follows.
>
> === Pre-bind state information === LOG: DisplayName = XamlDesignerFaultInjection (Partial) WRN: Partial binding information
> was supplied for an assembly: WRN: Assembly Name:
> XamlDesignerFaultInjection | Domain ID: 1 WRN: A partial bind occurs
> when only part of the assembly display name is provided. WRN: This
> might result in the binder loading an incorrect assembly. WRN: It is
> recommended to provide a fully specified textual identity for the
> assembly, WRN: that consists of the simple name, version, culture, and
> public key token. WRN: See whitepaper
> http://go.microsoft.com/fwlink/?LinkId=109270 for more information and
> common solutions to this issue. LOG: Appbase = file:///C:/Program
> Files (x86)/Microsoft Visual Studio/VS15Preview/Common7/IDE/ LOG:
> Initial PrivatePath = NULL LOG: Dynamic Base = NULL LOG: Cache Base =
> NULL LOG: AppName = devenv.exe Calling assembly : (Unknown).
> === LOG: This bind starts in default load context. LOG: Using application configuration file:
> C:\Users\blaze\AppData\Local\Microsoft\VisualStudio\15.0_2f751565\devenv.exe.config
> LOG: Using host configuration file: LOG: Using machine configuration
> file from
> C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
> LOG: Policy not being applied to reference at this time (private,
> custom, partial, or location-based assembly bind). LOG: Attempting
> download of new URL file:///C:/Program Files (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/XamlDesignerFaultInjection.DLL. LOG:
> Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Microsoft/TemplateProviders/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Microsoft/TemplateProviders/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/Debugger/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/Debugger/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/DiagnosticsHub/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/DiagnosticsHub/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/x86/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/x86/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/XamlDesignerFaultInjection.EXE. LOG:
> Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Microsoft/TemplateProviders/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Microsoft/TemplateProviders/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/Debugger/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/Debugger/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/DiagnosticsHub/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/CommonExtensions/Platform/DiagnosticsHub/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/x86/XamlDesignerFaultInjection.EXE.
> LOG: Attempting download of new URL file:///C:/Program Files
> (x86)/Microsoft Visual
> Studio/VS15Preview/Common7/IDE/PrivateAssemblies/DataCollectors/x86/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
> LOG: All probing URLs attempted and failed.
这是Xamarin.Forms还是XamlCTask中的错误？有没有人遇到过这个问题或知道如何修复它？
提前致谢
答案 0 :(得分：12)
这可能是IDE或项目级别的缓存问题。
如果它在IDE级别： - 做一个干净的 - 重启VS或XS - 重建
但你可能已经尝试过了。
我的猜测是，其中一个nuget更新没有正确清理，并且您在解决方案的不同项目中引用了不同版本的XF，或者一个.csproj文件引用了旧{{1}文件。
希望有一些手工清理房屋可以解决这个问题。
答案 1 :(得分：4)
如果您的项目依赖于使用XamlC的第三方程序集，并且该程序集是基于XF＆lt; 2.3.3构建的，那么您仍然可以解决此问题。
存在修复程序，将作为XF 2.3.3的第一个服务版本的一部分发布
答案 2 :(得分：0)
在我这边，我的Core和Android版本具有不同的Xamarin.Forms版本。在所有项目上安装相同的软件即可解决