更新 Visual Studio 2019 錯誤

Question

我有 Visual Studio 2019 社區的更新。 我現在使用的是 16.10.2 版。 但是現在我不能再打開我的解決方案了。 現有項目未加載，日志顯示如下：

===================== 18-6-2021 08:58:43 可恢復的 System.MissingMethodException：找不到方法：'System.Collections.Generic.LinkedListNode 1<.0> System.Collections.Generic.LinkedList 1.gdt_Last()'。 在 Microsoft.Build.Evaluation.ProjectRootElementCache.BoostEntryInStrongCache（ProjectRootElement projectRootElement） 在 Microsoft.Build.Evaluation.ProjectRootElementCache.RenameEntryInternal（String oldFullPathIfAny，ProjectRootElement projectRootElement） Construction.ProjectRootElement..ctor（字符串路徑，ProjectRootElementCacheBase projectRootElementCache，Boolean preserveFormatting）在 Microsoft.Build.Construction.ProjectRootElement.OpenLoader（字符串路徑，ProjectRootElementCacheBase projectRootElementCache）在 Microsoft.Build.Evaluation.ProjectRootElementCache.Get（字符串 projectFile，OpenProjectRootElement openProjectRootElement， Boolean isExplicitlyLoaded, Nullable 1 preserveFormatting) at Microsoft.Build.Construction.ProjectRootElement.Open(String path, ProjectRootElementCacheBase projectRootElementCache, Boolean isExplicitlyLoaded, Nullable 1 preserveFormatting) 在 Microsoft.Build.Construction.ProjectRootElement.Open(String path, ProjectCollection projectCollection, Nullable 1 preserveFormatting) at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.Microsoft.VisualStudio.ProjectSystem.IProjectLockReleaser.GetProjectXmlAsync(String projectFile, CancellationToken cancellationToken) at Microsoft.VisualStudio.ProjectSystem.UnconfiguredProjectImpl.<>c__DisplayClass185_0.<<SaveUserFileAsync>b__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.<JoinAsync>d__76.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.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__128.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__128.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.ProjectSystem.UnconfiguredProjectImpl.<DisposeAsync>d__174.MoveNext() =================== 18-6-2021 08:58:43 Recoverable System.MissingMethodException: Method not found: 'System.Collections.Generic.LinkedListNode 1 preserveFormatting) at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.Microsoft.VisualStudio.ProjectSystem.IProjectLockReleaser.GetProjectXmlAsync(String projectFile, CancellationToken cancellationToken) at Microsoft.VisualStudio.ProjectSystem.UnconfiguredProjectImpl.<>c__DisplayClass185_0.<<SaveUserFileAsync>b__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.<JoinAsync>d__76.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.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__128.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__128.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.ProjectSystem.UnconfiguredProjectImpl.<DisposeAsync>d__174.MoveNext() =================== 18-6-2021 08:58:43 Recoverable System.MissingMethodException: Method not found: 'System.Collections.Generic.LinkedListNode 1<.0> System.Collections.Generic.LinkedList 1.gdt_Last()'. at Microsoft.Build.Evaluation.ProjectRootElementCache.BoostEntryInStrongCache(ProjectRootElement projectRootElement) at Microsoft.Build.Evaluation.ProjectRootElementCache.RenameEntryInternal(String oldFullPathIfAny, ProjectRootElement projectRootElement) at Microsoft.Build.Evaluation.ProjectRootElementCache.AddEntry(ProjectRootElement projectRootElement) at Microsoft.Build.Construction.ProjectRootElement..ctor(String path, ProjectRootElementCacheBase projectRootElementCache, Boolean preserveFormatting) at Microsoft.Build.Construction.ProjectRootElement.OpenLoader(String path, ProjectRootElementCacheBase projectRootElementCache) at Microsoft.Build.Evaluation.ProjectRootElementCache.Get(String projectFile, OpenProjectRootElement openProjectRootElement, Boolean isExplicitlyLoaded, Nullable 1.gdt_Last()'. at Microsoft.Build.Evaluation.ProjectRootElementCache.BoostEntryInStrongCache(ProjectRootElement projectRootElement) at Microsoft.Build.Evaluation.ProjectRootElementCache.RenameEntryInternal(String oldFullPathIfAny, ProjectRootElement projectRootElement) at Microsoft.Build.Evaluation.ProjectRootElementCache.AddEntry(ProjectRootElement projectRootElement) at Microsoft.Build.Construction.ProjectRootElement..ctor(String path, ProjectRootElementCacheBase projectRootElementCache, Boolean preserveFormatting) at Microsoft.Build.Construction.ProjectRootElement.OpenLoader(String path, ProjectRootElementCacheBase projectRootElementCache) at Microsoft.Build.Evaluation.ProjectRootElementCache.Get(String projectFile, OpenProjectRootElement openProjectRootElement, Boolean isExplicitlyLoaded, Nullable 1 preserveFormatting) at Microsoft.Build.Construction.ProjectRootElement.Open(String path, ProjectRootElementCacheBase projectRootElementCache, Boolean isExplicitlyLoaded, Nullable 1 preserveFormatting) at Microsoft.Build.Construction.ProjectRootElement.Open(String path, ProjectCollection projectCollection, Nullable 1 preserveFormatting) 在 Microsoft.VisualStudio.ProjectSystem.ProjectLockService.Microsoft.VisualStudio.ProjectSystem.IProjectLockReleaser.GetProjectXmlAsync(String projectFile, CancellationToken cancellationToken) Microsoft.VisualStudio.ProjectSystem.UnconfiguredProjectImpl.<>c__DisplayClass185_0.<b__0>d.MoveNext() --- 從先前拋出異常的位置開始的堆棧跟蹤結束 --- 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任務任務) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Threading.JoinableTask.d__76.MoveNext() --- 從先前拋出異常的位置開始的堆棧跟蹤結束 --- at System.Runtime .CompilerServices.TaskAwaiter.ThrowForNonSuccess（任務任務）在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebu ggerNotification（任務任務）在 Microsoft.VisualStudio.ProjectSystem.ProjectLockService.d__128.MoveNext() --- 從上一個拋出異常的位置開始的堆棧跟蹤結束 --- 在 Microsoft.VisualStudio.ProjectSystem.ProjectLockService.d__128.MoveNext() --- 從先前拋出異常的位置開始的堆棧跟蹤結束 --- 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任務任務） 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任務任務）在 Microsoft.VisualStudio。 ProjectSystem.UnconfiguredProjectImpl.d__174.MoveNext() ===================

如果我使用 MVC Api 啟動新解決方案，則會創建解決方案，但不會添加項目。 手動將其添加到解決方案中會出現此錯誤：

未找到方法：'System.Collections.Generic.LinkedListNode1<.0> System.Collections.Generic.LinkedList1.gdt_Last()'

我嘗試了什么：

• 修復 Visual Studio
• 已卸載 Visual Studio 以及與 .NET 或 Microsoft 框架有關的所有內容
• 谷歌搜索（沒有找到）

有誰知道為什么會突然發生這種情況？

Answer 1

我懷疑最新版本的 VS2019 更新了解決方案緩存，沒有向后兼容性或損壞了它。 嘗試刪除解決方案文件夾中的隱藏文件夾.vs ，然后使用您要使用的 VS2019 重新打開您的解決方案。

Answer 2

檢查這個解決方案

打開.csproj 並刪除此標簽

<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild"> bla-bla </Target>

Answer 3

這是我的 2¢：

1. 如果您的項目有 NuGet 個包，請檢查並正確更新每個包。
2. 我不確定您是否擁有最近 5 版的最新版本的 .Net。當您獲取System.Collections.dll並將其替換為具有相同名稱的相關.dll 文件時發生了什么。 例如dll在我的電腦中是C:\Program Files\do.net\packs\Microsoft.NETCore.App.Ref\5.0.0\ref.net5.0 。

但是，我認為當您將框架更新為 .Net 5 以及更新相關的 NuGet 包時，問題就解決了。

如何更改項目版本？

右鍵單擊項目， Properties --> Application --> Target framework 。 目標框架下拉列表顯示安裝在您機器上的框架列表。 如果你不想更新它，至少拿.Net 5 並在下拉菜單中將版本調低。