Your app has entered a break state, but there is no code to show because all threads were executing external code (typically system or framework code)

Question

Visual Studio 2017 breaks in debug mode and displays the message:

Your app has entered a break state, but there is no code to show because all threa

Answer 1

You can also experience this issue if you've altered the build process with something like this to remove the PDB files. Typically I recommend if you want to remove the PDB files make the configuration specific to the "Release" configuration:

<Target Name="RemoveTranslationsAfterBuild" AfterTargets="AfterBuild" Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <RemoveDir Directories="@(FluentValidationExcludedCultures->'$(OutputPath)%(Filename)')" />

    <ItemGroup>
        <PDBFilesToDelete Include="$(TargetDir)\*.pdb"/>
    </ItemGroup>
    <Delete Files="@(PDBFilesToDelete)" />
</Target>

Then Follow @Eric's recommendations when debugging run the build under the "Debug" configuration.

Answer 2

Had the same problem, this was due to having the build set to release build. Then when asked if I would like to debug, I accidentally clicked ignore always.

I changed it to debug mode in the properties settings but the error was still there.

You will also need to change this in the configuration manager from Build/configuration manager and set Configuration to Debug as well.