System.Xml.XmlException: 给定编码中的字符无效。第 1 行，位置 1。使用 Nuget 时

Question

在过去的 24 小时内，Nuget 似乎向我抛出了一个奇怪的错误。

每次我尝试安装或卸载软件包时，它都会失败并出现以下错误：

System.Xml.XmlException: Invalid character in the given encoding. Line 1, position 1.

总堆栈为：

Attempting to gather dependencies information for package 'Microsoft.AspNet.WebApi.Client.5.2.3' with respect to project 'User Interface\SMRH.LPIC.Web', targeting '.NETFramework,Version=v4.5.1'
Attempting to resolve dependencies for package 'Microsoft.AspNet.WebApi.Client.5.2.3' with DependencyBehavior 'Lowest'
Resolving actions to install package 'Microsoft.AspNet.WebApi.Client.5.2.3'
Resolved actions to install package 'Microsoft.AspNet.WebApi.Client.5.2.3'
For adding package 'Microsoft.AspNet.WebApi.Client.5.2.3' to project 'SMRH.LPIC.Web' that targets 'net451'.
For adding package 'Microsoft.AspNet.WebApi.Client.5.2.3' to project    'SMRH.LPIC.Web' that targets 'net451'.
Package 'Microsoft.AspNet.WebApi.Client.5.2.3' already exists in folder   'F:\TFS\DevTeamCode\LPIC\SMRH.LPIC\packages'
Added reference 'System.Net.Http.Formatting' to project 'SMRH.LPIC.Web'.
Added package 'Microsoft.AspNet.WebApi.Client.5.2.3' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebApi.Client 5.2.3' to SMRH.LPIC.Web
Added file 'web.config'.
Install failed. Rolling back...
System.Xml.XmlException: Invalid character in the given encoding. Line 1, position 1.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
at System.Xml.XmlTextReaderImpl.InvalidCharRecovery(Int32& bytesCount, Int32& charsCount)
at System.Xml.XmlTextReaderImpl.GetChars(Int32 maxCharsCount)
at System.Xml.XmlTextReaderImpl.ReadData()
at System.Xml.XmlTextReaderImpl.SwitchEncoding(Encoding newEncoding)
at System.Xml.XmlTextReaderImpl.SwitchEncodingToUTF8()
at System.Xml.XmlTextReaderImpl.ParseXmlDeclaration(Boolean isTextDecl)
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
at NuGet.ProjectManagement.XmlUtility.LoadSafe(Stream input, LoadOptions options)
at NuGet.ProjectManagement.XmlUtility.GetDocument(String root, String path)
at NuGet.ProjectManagement.XmlUtility.GetOrCreateDocument(XName rootName, String root, String path, INuGetProjectContext nuGetProjectContext)
at NuGet.PackageManagement.VisualStudio.BindingRedirectManager.GetConfiguration()
at NuGet.PackageManagement.VisualStudio.BindingRedirectManager.AddBindingRedirects(IEnumerable`1 bindingRedirects)
at NuGet.PackageManagement.VisualStudio.RuntimeHelpers.<AddBindingRedirectsAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.VisualStudio.RuntimeHelpers.<AddBindingRedirectsAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.VisualStudio.RuntimeHelpers.<AddBindingRedirectsAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.VisualStudio.RuntimeHelpers.<AddBindingRedirectsAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.VisualStudio.VSMSBuildNuGetProjectSystem.<<AddBindingRedirects>b__55_0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
at NuGet.PackageManagement.VisualStudio.VSMSBuildNuGetProjectSystem.AddBindingRedirects()
at NuGet.ProjectManagement.MSBuildNuGetProject.PostProcessAsync(INuGetProjectContext nuGetProjectContext, CancellationToken token)
at NuGet.PackageManagement.NuGetPackageManager.<ExecuteNuGetProjectActionsAsync>d__42.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at NuGet.PackageManagement.NuGetPackageManager.<ExecuteNuGetProjectActionsAsync>d__42.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.UI.UIActionEngine.<ExecuteActionsAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at NuGet.PackageManagement.UI.UIActionEngine.<PerformActionAsync>d__3.MoveNext()
========== Finished ==========

它不会给我它失败的文件。删除包文件夹并恢复它也不起作用。

我检查了 web.config，它似乎没有格式问题。

重新启动 PC 和 VS 但没有运气。

在 C# 环境中使用 Visual Studio 2015 Enterprise。

Answer 1

我遇到了完全相同的问题。它与nuget缓存有关。我清除了缓存并再次运行 dotnet restore 命令并且它起作用了。

清除缓存的命令：dotnet nuget locals all --clear

还原 nuget 包：dotnet restore --no-cache