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  • Visual Studio 2019 编译.Net Core Console项目出现【MSB4018 The "CreateAppHost" task failed unexpectedly】 错误

    需要测试一个小东东,使用Visual Studio 2019新建了一个.Net Core的Console程序,但是在编译的时候一直报错,死活编译不通过。

    错误信息:

    Severity Code Description Project File Line	Suppression State
    Error	MSB4018	The "CreateAppHost" task failed unexpectedly.
    System.AggregateException: One or more errors occurred. ---> Microsoft.NET.HostModel.HResultException: 8007006E
       at Microsoft.NET.HostModel.ResourceUpdater.Update()
       at Microsoft.NET.HostModel.AppHost.HostWriter.<>c__DisplayClass2_0.<CreateAppHost>g__UpdateResources|1()
       at Microsoft.NET.HostModel.RetryUtil.RetryOnWin32Error(Action func)
       at Microsoft.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFilePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom)
       --- End of inner exception stack trace ---
       at Microsoft.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFilePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom)
       at Microsoft.NET.Build.Tasks.CreateAppHost.ExecuteCore()
       at Microsoft.NET.Build.Tasks.TaskBase.Execute()
       at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
       at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
    ---> (Inner Exception #0) Microsoft.NET.HostModel.HResultException: 8007006E
       at Microsoft.NET.HostModel.ResourceUpdater.Update()
       at Microsoft.NET.HostModel.AppHost.HostWriter.<>c__DisplayClass2_0.<CreateAppHost>g__UpdateResources|1()
       at Microsoft.NET.HostModel.RetryUtil.RetryOnWin32Error(Action func)
       at Microsoft.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFilePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom)<---
    
    ---> (Inner Exception #1) System.UnauthorizedAccessException: Access to the path 'D:VS2019CodeProjectsConsoleApp9ConsoleApp9objDebug
    etcoreapp3.1ConsoleApp9.exe' is denied.
       at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
       at System.IO.File.InternalDelete(String path, Boolean checkHost)
       at System.IO.File.Delete(String path)
       at Microsoft.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFilePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom)<---
    	ConsoleApp9	C:Program Filesdotnetsdk3.1.100SdksMicrosoft.NET.Sdk	argetsMicrosoft.NET.Sdk.targets	393	
    
    

    网上的方案有如下,也都进行了尝试:

    • 重启Visual Studio
    • 以管理员身份运行Visual Studio
    • 清理解决方案
    • 删除bin目录下的所有文件

    然鹅,均无效,无奈之下继续寻找解决方案,发现用Process Monitor来监控到底是谁在搞鬼。

    点击下载 Process Monitor.

    终于发现了罪魁祸首。

    原来是你,让我花了我一个上午的时间在折腾。

    立马干掉

    果然,一切编译正常,大功告成。

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  • 原文地址:https://www.cnblogs.com/hand/p/12112647.html
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