【发布时间】：2020-09-20 06:58:29
【问题描述】：
所以，我从 GitHub 下载了一个示例解决方案（称为 mini-profiler），其中包含几个 Web 应用程序。该解决方案在 VS 2019 中运行。我有 VS 2017 Enterprise，所以我安装了最新的 VS 2019 (16.6.1)。我安装了几乎所有的功能。
网络应用程序构建良好。但是当我尝试运行（调试或不调试）它们时，我得到......
无论我尝试运行哪个 Web 应用程序，或者我在 IIS Express 或 IIS 上运行它，都会发生这种情况。
编写迷你分析器的人不知道问题出在哪里。而且看起来问题不是他的图书馆特有的。
我可以在我的 VS 2017 Enterprise 中正常运行（虽然不是这个解决方案，这个解决方案不会在 VS 2017 中加载）。
另外，我注意到的另一件事是 .NET Core 框架在下拉列表中不可用...
虽然我安装了很多...
我尝试运行的 Web 应用项目“Samples.Mvc5”不是 .NET Core 项目，但我仍然想指出这一点。
仅供参考：csproj 文件的开头如下所示...
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<OutputType>Library</OutputType>
<RootNamespace>Samples.Mvc5</RootNamespace>
<AssemblyName>Samples.Mvc5</AssemblyName>
<TargetFramework>net462</TargetFramework>
<UseIISExpress>true</UseIISExpress>
<OutputPath>bin\</OutputPath>
<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
</PropertyGroup>
这是我的 VS 2019 中安装的内容：
"Component.Android.NDK.R16B",
"Component.Android.SDK25.Private",
"Component.Android.SDK28",
"Component.Ant",
"Component.CPython3.x64",
"Component.Linux.CMake",
"Component.MDD.Android",
"Component.MDD.Linux",
"Component.Microsoft.VisualStudio.LiveShare",
"Component.Microsoft.VisualStudio.RazorExtension",
"Component.Microsoft.VisualStudio.Web.AzureFunctions",
"Component.Microsoft.Web.LibraryManager",
"Component.OpenJDK",
"Component.Xamarin",
"Component.Xamarin.RemotedSimulator",
"Microsoft.Component.Azure.DataLake.Tools",
"Microsoft.Component.ClickOnce",
"Microsoft.Component.CodeAnalysis.SDK",
"Microsoft.Component.MSBuild",
"Microsoft.Component.NetFX.Native",
"Microsoft.Component.PythonTools",
"Microsoft.Component.PythonTools.Miniconda",
"Microsoft.Component.PythonTools.Web",
"Microsoft.ComponentGroup.Blend",
"Microsoft.Net.Component.3.5.DeveloperTools",
"Microsoft.Net.Component.4.5.1.TargetingPack",
"Microsoft.Net.Component.4.5.2.TargetingPack",
"Microsoft.Net.Component.4.5.TargetingPack",
"Microsoft.Net.Component.4.6.1.SDK",
"Microsoft.Net.Component.4.6.1.TargetingPack",
"Microsoft.Net.Component.4.6.2.SDK",
"Microsoft.Net.Component.4.6.2.TargetingPack",
"Microsoft.Net.Component.4.6.TargetingPack",
"Microsoft.Net.Component.4.7.1.SDK",
"Microsoft.Net.Component.4.7.1.TargetingPack",
"Microsoft.Net.Component.4.7.2.SDK"
"Microsoft.Net.Component.4.7.2.TargetingPack",
"Microsoft.Net.Component.4.7.SDK",
"Microsoft.Net.Component.4.7.TargetingPack",
"Microsoft.Net.Component.4.8.SDK",
"Microsoft.Net.Component.4.8.TargetingPack",
"Microsoft.Net.Component.4.TargetingPack",
"Microsoft.Net.ComponentGroup.DevelopmentPrerequisites",
"Microsoft.Net.ComponentGroup.TargetingPacks.Common",
"Microsoft.Net.Core.Component.SDK.2.1",
"Microsoft.Net.Core.Component.SDK.2.2",
"Microsoft.Net.Core.Component.SDK.3.0",
"Microsoft.NetCore.Component.DevelopmentTools",
"Microsoft.NetCore.Component.Runtime.3.1",
"Microsoft.NetCore.Component.SDK",
"Microsoft.NetCore.Component.Web",
"Microsoft.NetCore.ComponentGroup.DevelopmentTools.2.1",
"Microsoft.NetCore.ComponentGroup.Web.2.1",
"Microsoft.VisualStudio.Component.AppInsights.Tools",
"Microsoft.VisualStudio.Component.AspNet45",
"Microsoft.VisualStudio.Component.Azure.AuthoringTools",
"Microsoft.VisualStudio.Component.Azure.ClientLibs",
"Microsoft.VisualStudio.Component.Azure.Compute.Emulator",
"Microsoft.VisualStudio.Component.Azure.Kubernetes.Tools",
"Microsoft.VisualStudio.Component.Azure.Powershell",
"Microsoft.VisualStudio.Component.Azure.ResourceManager.Tools",
"Microsoft.VisualStudio.Component.Azure.ServiceFabric.Tools",
"Microsoft.VisualStudio.Component.Azure.Storage.AzCopy",
"Microsoft.VisualStudio.Component.Azure.Storage.Emulator",
"Microsoft.VisualStudio.Component.Azure.Waverton",
"Microsoft.VisualStudio.Component.Azure.Waverton.BuildTools",
"Microsoft.VisualStudio.Component.ClassDesigner",
"Microsoft.VisualStudio.Component.CloudExplorer",
"Microsoft.VisualStudio.Component.Common.Azure.Tools",
"Microsoft.VisualStudio.Component.Debugger.JustInTime",
"Microsoft.VisualStudio.Component.DependencyValidation.Community",
"Microsoft.VisualStudio.Component.DiagnosticTools",
"Microsoft.VisualStudio.Component.DockerTools",
"Microsoft.VisualStudio.Component.DotNetModelBuilder",
"Microsoft.VisualStudio.Component.EntityFramework",
"Microsoft.VisualStudio.Component.FSharp",
"Microsoft.VisualStudio.Component.FSharp.Desktop",
"Microsoft.VisualStudio.Component.FSharp.WebTemplates",
"Microsoft.VisualStudio.Component.GraphDocument",
"Microsoft.VisualStudio.Component.Graphics",
"Microsoft.VisualStudio.Component.Graphics.Tools",
"Microsoft.VisualStudio.Component.IISExpress",
"Microsoft.VisualStudio.Component.IntelliCode",
"Microsoft.VisualStudio.Component.JavaScript.Diagnostics",
"Microsoft.VisualStudio.Component.JavaScript.TypeScript",
"Microsoft.VisualStudio.Component.LinqToSql",
"Microsoft.VisualStudio.Component.MSODBC.SQL",
"Microsoft.VisualStudio.Component.MSSQL.CMDLnUtils",
"Microsoft.VisualStudio.Component.ManagedDesktop.Core",
"Microsoft.VisualStudio.Component.ManagedDesktop.Prerequisites",
"Microsoft.VisualStudio.Component.Merq",
"Microsoft.VisualStudio.Component.MonoDebugger",
"Microsoft.VisualStudio.Component.Node.Tools",
"Microsoft.VisualStudio.Component.NuGet",
"Microsoft.VisualStudio.Component.NuGet.BuildTools",
"Microsoft.VisualStudio.Component.PortableLibrary",
"Microsoft.VisualStudio.Component.Roslyn.Compiler",
"Microsoft.VisualStudio.Component.Roslyn.LanguageServices",
"Microsoft.VisualStudio.Component.SQL.ADAL",
"Microsoft.VisualStudio.Component.SQL.CLR",
"Microsoft.VisualStudio.Component.SQL.DataSources",
"Microsoft.VisualStudio.Component.SQL.LocalDB.Runtime",
"Microsoft.VisualStudio.Component.SQL.SSDT",
"Microsoft.VisualStudio.Component.Sharepoint.Tools",
"Microsoft.VisualStudio.Component.TeamOffice",
"Microsoft.VisualStudio.Component.TextTemplating",
"Microsoft.VisualStudio.Component.TypeScript.3.8",
"Microsoft.VisualStudio.Component.VC.ASAN",
"Microsoft.VisualStudio.Component.VC.ATL",
"Microsoft.VisualStudio.Component.VC.CMake.Project",
"Microsoft.VisualStudio.Component.VC.CoreIde",
"Microsoft.VisualStudio.Component.VC.DiagnosticTools",
"Microsoft.VisualStudio.Component.VC.Redist.14.Latest",
"Microsoft.VisualStudio.Component.VC.TestAdapterForBoostTest",
"Microsoft.VisualStudio.Component.VC.TestAdapterForGoogleTest",
"Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
"Microsoft.VisualStudio.Component.VSSDK",
"Microsoft.VisualStudio.Component.VisualStudioData",
"Microsoft.VisualStudio.Component.Wcf.Tooling",
"Microsoft.VisualStudio.Component.Web",
"Microsoft.VisualStudio.Component.WebDeploy",
"Microsoft.VisualStudio.Component.Windows10SDK.18362",
"Microsoft.VisualStudio.Component.Workflow",
"Microsoft.VisualStudio.ComponentGroup.Azure.CloudServices",
"Microsoft.VisualStudio.ComponentGroup.Azure.Prerequisites",
"Microsoft.VisualStudio.ComponentGroup.Azure.ResourceManager.Tools",
"Microsoft.VisualStudio.ComponentGroup.AzureFunctions",
"Microsoft.VisualStudio.ComponentGroup.IISDevelopment",
"Microsoft.VisualStudio.ComponentGroup.MSIX.Packaging",
"Microsoft.VisualStudio.ComponentGroup.NativeDesktop.Core",
"Microsoft.VisualStudio.ComponentGroup.UWP.NetCoreAndStandard",
"Microsoft.VisualStudio.ComponentGroup.UWP.Support",
"Microsoft.VisualStudio.ComponentGroup.UWP.Xamarin",
"Microsoft.VisualStudio.ComponentGroup.VisualStudioExtension.Prerequisites",
"Microsoft.VisualStudio.ComponentGroup.Web",
"Microsoft.VisualStudio.ComponentGroup.Web.CloudTools",
"Microsoft.VisualStudio.ComponentGroup.WebToolsExtensions",
"Microsoft.VisualStudio.ComponentGroup.WebToolsExtensions.CMake",
"Microsoft.VisualStudio.ComponentGroup.WebToolsExtensions.TemplateEngine",
"Microsoft.VisualStudio.Web.Mvc4.ComponentGroup",
"Microsoft.VisualStudio.Workload.Azure",
"Microsoft.VisualStudio.Workload.CoreEditor",
"Microsoft.VisualStudio.Workload.Data",
"Microsoft.VisualStudio.Workload.DataScience",
"Microsoft.VisualStudio.Workload.ManagedDesktop",
"Microsoft.VisualStudio.Workload.NativeCrossPlat",
"Microsoft.VisualStudio.Workload.NativeDesktop",
"Microsoft.VisualStudio.Workload.NativeMobile",
"Microsoft.VisualStudio.Workload.NetCoreTools",
"Microsoft.VisualStudio.Workload.NetCrossPlat",
"Microsoft.VisualStudio.Workload.NetWeb",
"Microsoft.VisualStudio.Workload.Node",
"Microsoft.VisualStudio.Workload.Office",
"Microsoft.VisualStudio.Workload.Python",
"Microsoft.VisualStudio.Workload.Universal",
"Microsoft.VisualStudio.Workload.VisualStudioExtension",
"Microsoft.VisualStudio.Component.CoreEditor",
【问题讨论】：
标签： asp.net visual-studio .net-core visual-studio-2019