aspnet 核心 2.0 dotnet 运行时出现警告

本文介绍了aspnet 核心 2.0 dotnet 运行时出现警告的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我从 dotnet SDK 1.1 升级到 dotnet core SDK 2.0，但在使用 2.0.0 版本创建的dotnet run 项目上，它们运行但有警告.

C:Program Filesdotnetsdk2.0.0Microsoft.Common.CurrentVersion.targets(1987,5):警告 MSB3106:程序集强名称C:Program FilesdotnetsdkNuGetFallbackFoldermicrosoft.netcore.app2.0.0efetcoreapp2.0WindowsBase.dll" 要么是找不到路径，要么是格式错误的完整程序集名称.如果它是一个完整的程序集名称，它可能包含需要用反斜杠() 转义的字符.这些字符是 Equals(=)、Comma(,)、Quote(")、Apostrophe(')、Backslash().[E:eposutlaspnetcorehrcentralUgandaTelecom.HRCentral.WebUgandaTelecom.HRCentral.Web.csproj]

使用 E:eposutlaspnetcorehrcentralUgandaTelecom.HRCentral.WebPropertieslaunchSettings.json 中的启动设置...

无法应用启动配置文件(默认)".

找不到可用的启动配置文件.

托管环境:生产

内容根路径:E:eposutlaspnetcorehrcentralUgandaTelecom.HRCentral.Web

现在正在收听:http://localhost:5000

应用程序已启动.按 Ctrl+C 关闭.

在升级前使用 1.1 版创建的项目按预期运行.我曾尝试寻求有关如何克服此问题的指导，但失败了.

查看了配置文件，但不清楚要做什么.

我在删除所有旧版本后重新安装了 SDK，将 Visual Studio Community 2017 升级到 15.3.5，但仍然出现警告.

当我浏览 url http://localhost:5000 出现错误>

失败:Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[0]发生未处理的异常:文件或目录已损坏且无法读取System.IO.IOException: 文件或目录已损坏且无法读取在 System.IO.FileStream.OpenHandle(FileMode 模式，FileShare 共享，FileOptions 选项)在 System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)在 System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)在 System.IO.File.OpenRead(String path)在 Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.CreateMetadataReference(字符串路径)在 Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.PopulateFeature(IEnumerable1 部分，MetadataReferenceFeature 功能)在 Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartManager.PopulateFeature[TFeature](TFeature 功能)在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorReferenceManager.GetCompilationReferences()在 System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func1 valueFactory)在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorReferenceManager.get_CompilationReferences()在 Microsoft.AspNetCore.Mvc.Razor.Internal.LazyMetadataReferenceFeature.get_References()在 Microsoft.CodeAnalysis.Razor.CompilationTagHelperFeature.GetDescriptors()在 Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ExecuteCore(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Razor.Language.RazorEnginePhaseBase.Execute(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process(RazorCodeDocument 文档)在 Microsoft.AspNetCore.Razor.Language.RazorTemplateEngine.GenerateCode(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CompileAndEmit(String relativePath)在 Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CreateCacheEntry(String normalizedPath)--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 System.Runtime.CompilerServices.TaskAwaiter1.GetResult()在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorPageFactoryProvider.CreateFactory(String relativePath)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet1 expireTokens, String relativePath, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss(ViewLocationExpanderContext expanderContext, ViewLocationCacheKey cacheKey)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations(ActionContext actionContext, String pageName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView(ActionContext context, String viewName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView(ActionContext context, String viewName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewResultExecutor.FindView(ActionContext actionContext, ViewResult viewResult)在 Microsoft.AspNetCore.Mvc.ViewResult.d__26.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__19.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__24.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResultExecutedContext context)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__22.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__17.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__15.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.d__6.MoveNext()失败:Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[0]试图执行错误处理程序时抛出异常.System.IO.IOException: 文件或目录已损坏且无法读取在 System.IO.FileStream.OpenHandle(FileMode 模式，FileShare 共享，FileOptions 选项)在 System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)在 System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)在 System.IO.File.OpenRead(String path)在 Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.CreateMetadataReference(字符串路径)在 Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.PopulateFeature(IEnumerable1 部分，MetadataReferenceFeature 功能)在 Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartManager.PopulateFeature[TFeature](TFeature 功能)在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorReferenceManager.GetCompilationReferences()在 System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func1 valueFactory)在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorReferenceManager.get_CompilationReferences()在 Microsoft.AspNetCore.Mvc.Razor.Internal.LazyMetadataReferenceFeature.get_References()在 Microsoft.CodeAnalysis.Razor.CompilationTagHelperFeature.GetDescriptors()在 Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ExecuteCore(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Razor.Language.RazorEnginePhaseBase.Execute(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process(RazorCodeDocument 文档)在 Microsoft.AspNetCore.Razor.Language.RazorTemplateEngine.GenerateCode(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CompileAndEmit(String relativePath)在 Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CreateCacheEntry(String normalizedPath)--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 System.Runtime.CompilerServices.TaskAwaiter1.GetResult()在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorPageFactoryProvider.CreateFactory(String relativePath)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet1 expireTokens, String relativePath, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss(ViewLocationExpanderContext expanderContext, ViewLocationCacheKey cacheKey)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations(ActionContext actionContext, String pageName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView(ActionContext context, String viewName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView(ActionContext context, String viewName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewResultExecutor.FindView(ActionContext actionContext, ViewResult viewResult)在 Microsoft.AspNetCore.Mvc.ViewResult.d__26.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__19.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__24.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResultExecutedContext context)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__22.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__17.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__15.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.d__6.MoveNext()失败:Microsoft.AspNetCore.Server.Kestrel[13]连接 ID0HL878FK5OAHU"，请求 ID0HL878FK5OAHU:00000001":应用程序抛出了一个未处理的异常.System.IO.IOException: 文件或目录已损坏且无法读取在 System.IO.FileStream.OpenHandle(FileMode 模式，FileShare 共享，FileOptions 选项)在 System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)在 System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)在 System.IO.File.OpenRead(String path)在 Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.CreateMetadataReference(字符串路径)在 Microsoft.AspNetCore.Mvc.Razor.Compilation.MetadataReferenceFeatureProvider.PopulateFeature(IEnumerable1 部分，MetadataReferenceFeature 功能)在 Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartManager.PopulateFeature[TFeature](TFeature 功能)在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorReferenceManager.GetCompilationReferences()在 System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func1 valueFactory)在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorReferenceManager.get_CompilationReferences()在 Microsoft.AspNetCore.Mvc.Razor.Internal.LazyMetadataReferenceFeature.get_References()在 Microsoft.CodeAnalysis.Razor.CompilationTagHelperFeature.GetDescriptors()在 Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ExecuteCore(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Razor.Language.RazorEnginePhaseBase.Execute(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process(RazorCodeDocument 文档)在 Microsoft.AspNetCore.Razor.Language.RazorTemplateEngine.GenerateCode(RazorCodeDocument codeDocument)在 Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CompileAndEmit(String relativePath)在 Microsoft.AspNetCore.Mvc.Razor.Internal.RazorViewCompiler.CreateCacheEntry(String normalizedPath)--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 System.Runtime.CompilerServices.TaskAwaiter1.GetResult()在 Microsoft.AspNetCore.Mvc.Razor.Internal.DefaultRazorPageFactoryProvider.CreateFactory(String relativePath)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet1 expireTokens, String relativePath, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss(ViewLocationExpanderContext expanderContext, ViewLocationCacheKey cacheKey)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations(ActionContext actionContext, String pageName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView(ActionContext context, String viewName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView(ActionContext context, String viewName, Boolean isMainPage)在 Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewResultExecutor.FindView(ActionContext actionContext, ViewResult viewResult)在 Microsoft.AspNetCore.Mvc.ViewResult.d__26.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__19.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__24.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResultExecutedContext context)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__22.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__17.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__15.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.d__6.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.d__6.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Hosting.Internal.RequestServicesContainerMiddleware.d__3.MoveNext()--- 从上一个抛出异常的位置开始的堆栈跟踪结束 ---在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)在 Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Frame`1.d__2.MoveNext()

解决方案

阅读.NET Core 2 后不起作用....#920 通过重命名 NuGetFallbackFolder、删除 bin 和 obj 文件夹来解决问题项目，使用提升的权限从命令提示符运行 dotnet restore

I upgraded to dotnet core SDK 2.0 from dotnet SDK 1.1, but on dotnet run projects that have been created with version 2.0.0 they run but with warnings.

Projects that were created with version 1.1 before the upgrade are running as expected. I have tried to search for guidance on how to overcome this but I have failed.

Looked at the config files, but not clear on what todo.

I have reinstalled the SDK after removing all old version, Upgraded Visual Studio Community 2017 to 15.3.5 but still stuck with the warnings.

When I browse the url http://localhost:5000 I get error

解决方案

After reading .NET Core 2 does not work.... #920 resolved the problem by renaming the NuGetFallbackFolder, deleting the bin and obj folders from the project, running dotnet restore from command prompt with elevated privileges

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