A fatal error has occurred and debugging needs to be terminated. For more details please see the Microsoft Help and Support web site. HRESULT=0x8000ffff. ErrorCode=0x0.

Question

Steps to reproduce:

Right click in a unit test

click start debugging.

A fatal error has occurred and debugging needs to be terminated.  For more details please see the Microsoft Help and Support web site.  HRESULT=0x8000ffff.  ErrorCode=0x0.

Visual Studio Info:

Microsoft Visual Studio Community 2017 RC
Version 15.0.26206.0 D15REL
Microsoft .NET Framework
Version 4.6.01586

Installed Version: Community

Visual Basic 2017 RC   00369-50000-00000-AA523
Microsoft Visual Basic 2017 RC

Visual C# 2017 RC   00369-50000-00000-AA523
Microsoft Visual C# 2017 RC

Visual C++ 2017 RC   00369-50000-00000-AA523
Microsoft Visual C++ 2017 RC

Visual F# 4.1   00369-50000-00000-AA523
Microsoft Visual F# 4.1

ASP.NET and Web Tools 2017   15.0.30206.0
ASP.NET and Web Tools 2017

ASP.NET Web Frameworks and Tools 2017   5.2.50127.0
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0   15.0.30126.0
Azure App Service Tools v3.0.0

Azure Data Lake Node   1.0
This package contains the Data Lake integration nodes for Server Explorer.

Azure Data Lake Tools for Visual Studio   2.2.5000.0
Microsoft Azure Data Lake Tools for Visual Studio

Common Azure Tools   1.9
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Fabric.DiagnosticEvents   1.0
Fabric Diagnostic Events

GitHub.VisualStudio   2.2.0.6
A Visual Studio Extension that brings the GitHub Flow into Visual Studio.

JavaScript Language Service   2.0
JavaScript Language Service

JavaScript Project System   2.0
JavaScript Project System

JavaScript UWP Project System   2.0
JavaScript UWP Project System

KofePackagePackage Extension   1.0
KofePackagePackage Visual Studio Extension Detailed Info

Markdown Editor   1.10.186
A full featured Markdown editor with live preview and syntax highlighting. Supports GitHub flavored Markdown.

Merq   1.1.13-alpha (2f64b6d)
Command Bus, Event Stream and Async Manager for Visual Studio extensions.

Microsoft Azure Hive Query Language Service   2.2.5000.0
Language service for Hive query

Microsoft Azure Tools   2.9
Microsoft Azure Tools for Microsoft Visual Studio 2017 - v2.9.50131.1

Microsoft MI-Based Debugger   1.0
Provides support for connecting Visual Studio to MI compatible debuggers

Microsoft Visual Studio VC Package   1.0
Microsoft Visual Studio VC Package

Mono Debugging for Visual Studio   Mono.Debugging.VisualStudio
Support for debugging Mono processes with Visual Studio.

NuGet Package Manager   4.0.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.

Open Command Line   2.1.179
Opens a command line at the root of the project. Support for all consoles such as CMD, PowerShell, Bash etc. Provides syntax highlighting, Intellisense and execution of .cmd and .bat files.

Redgate SQL Search   2.3.9.1092
Search functionality for SQL Server databases, from within Visual Studio

SQL Server Data Tools   15.1.61701.270
Microsoft SQL Server Data Tools

ToolWindowHostedEditor   1.0
Hosting json editor into a tool window

TypeScript   2.1.5.0
TypeScript tools for Visual Studio

Visual Studio Spell Check Everywhere   VSSpellCheckEverywhere
An extension that enables spell checking within any Visual Studio file editor or tool window that uses WPF text boxes.
https://GitHub.com/EWSoftware/VSSpellChecker

Visual Studio Spell Checker   VSSpellChecker
An editor extension that checks the spelling of comments, strings, and plain text as you type or interactively with tool windows.
https://GitHub.com/EWSoftware/VSSpellChecker

Visual Studio Tools for Unity   3.0.0.1
Visual Studio Tools for Unity

Visual Studio Tools for Universal Windows Apps   15.0.26206.00
The Visual Studio Tools for Universal Windows apps allow you to build a single universal app experience that can reach every device running Windows 10: phone, tablet, PC, and more. It includes the Microsoft Windows 10 Software Development Kit.

Xamarin   4.3.0.664 (f42aa37)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android   7.1.0.31 (c9880f9)
Visual Studio extension to enable development for Xamarin.Android.

Xamarin.Android SDK   7.1.0.31 (c9880f9)
Xamarin.Android Reference Assemblies and MSBuild support.

Xamarin.iOS   10.4.0.102 (20d957a)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS and Xamarin.Mac SDK   10.4.0.102 (20d957a)
Xamarin.iOS and Xamarin.Mac Reference Assemblies and MSBuild support.

csproj file

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|netcoreapp1.1|AnyCPU'">
    <OutputType>Library</OutputType>
  </PropertyGroup>

  <PropertyGroup>
    <TargetFrameworks>netcoreapp1.1;net462</TargetFrameworks>
    <AssemblyName>AdaptiveClientDemo.Tests</AssemblyName>
    <PackageId>AdaptiveClientDemo.Tests</PackageId>
    <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
    <NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">$(PackageTargetFallback);netcoreapp1.1;portable-net45+win8</PackageTargetFallback>
    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">1.1.0</RuntimeFrameworkVersion>
    <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
    <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
    <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
    <ApplicationIcon />
    <OutputTypeEx>library</OutputTypeEx>
    <StartupObject />
  </PropertyGroup>

  <ItemGroup>
    <ProjectReference Include="..\..\src\Application.Core\Application.Core.csproj" />
    <ProjectReference Include="..\..\src\Application.Domain\Application.Domain.csproj" />
    <ProjectReference Include="..\..\src\Application.Model\Application.Model.csproj" />
    <ProjectReference Include="..\..\src\Application.Services\Application.Services.csproj" />
    <ProjectReference Include="..\..\src\Application.WebAPIClient\Application.WebAPIClient.csproj" />
    <ProjectReference Include="..\..\src\Application.WCFClient\Application.WCFClient.csproj" />
    <ProjectReference Include="..\..\src\AppComponents\AppComponents.csproj" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="LeaderAnalytics.AdaptiveClient" Version="0.12.0" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0-preview-20170210-02" />
    <PackageReference Include="MSTest.TestAdapter" Version="1.1.10-rc2" />
    <PackageReference Include="MSTest.TestFramework" Version="1.0.8-rc2" />
    <!--<PackageReference Include="dotnet-test-nunit" Version="3.4.0-beta-1" />-->
    <!--<PackageReference Include="NUnit" Version="3.6.0" />-->
    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.PlatformAbstractions" Version="1.1.0" />
    <PackageReference Include="Moq" Version="4.6.38-alpha" />
  </ItemGroup>

  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">
    <PackageReference Include="System.ServiceModel.Duplex" Version="4.3.0" />
    <PackageReference Include="System.ServiceModel.Http" Version="4.3.0" />
    <PackageReference Include="System.ServiceModel.NetTcp" Version="4.3.0" />
    <PackageReference Include="System.ServiceModel.Security" Version="4.3.0" />
    <PackageReference Include="System.Xml.XmlSerializer" Version="4.3.0" />
  </ItemGroup>

  <ItemGroup Condition=" '$(TargetFramework)' == 'net462' ">
    <PackageReference Include="System.Diagnostics.Process" Version="4.3.0" />
    <Reference Include="System.Runtime.Serialization" />
    <Reference Include="System.ServiceModel" />
    <Reference Include="System.Xml" />
    <Reference Include="System" />
    <Reference Include="Microsoft.CSharp" />
  </ItemGroup>

  <ItemGroup>
    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
  </ItemGroup>

</Project>

Answer 1

Hi SWheaties,

I could not repro your issue in my side, because I could debug a new unit test without any problems.

So please update the VS2017 RC to the latest version.

Tools->Extensions and Updates -> Updates-> Update the VS2017 RC.

Then try again.

In addition, please create a new project, and debug it to see whether has the same issue.

Sincerely,

Oscar

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MSDN Community Support
Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to MSDN Support, feel free to contact [e-mail].

Answer 2

Thank you Oscar, there are no other updates for VS at this time.

I managed to isolate the lines below in the .csproj file.  These lines were added by VS or the conversion tool.

 <!--<GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
    <NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">$(PackageTargetFallback);netcoreapp1.1;portable-net45+win8</PackageTargetFallback>
    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">1.1.0</RuntimeFrameworkVersion>-->

Answer 3

Hi SWheaties,

According to your description, when you comment these code, the error appeared, am I right?

Have you created an new project to test?

Sincerely,

Oscar

---

MSDN Community Support
Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to MSDN Support, feel free to contact [e-mail].

Answer 4

>>when you comment these code, the error appeared, am I right?

No - when I comment the code the error went away.

>>Have you created an new project to test?

Yes but I cannot reproduce the error. 

Answer 5

Change your project type from Library to Console Application

It works fine for me...

My final csproj is here: https://gist.github.com/ircnelson/9cbddb681d520d7f581dbfc99709a9e1

Answer 6

Try clean the solution first. Tool -> Clean Solution 

Answer 7

If that doesn't work, you need to manually delete all of the "bin" and "obj" folders.