How to run unit tests with .NET version 4.6.2 in Visual Studio 2019? - visual-studio-2019

Question

I'm trying to resolve this warning from unit test runs in Visual Studio:
[6/7/2019 7:16:21 PM Warning] Test run will use DLL(s) built for
framework .NETFramework,Version=v4.5 and platform X64. Following
DLL(s) do not match framework/platform settings. MyProject.Tests.dll
is built for Framework 4.6.2 and Platform AnyCPU. Go to
http://go.microsoft.com/fwlink/?LinkID=236877&clcid=0x409 for more
details on managing these settings.
I know that I need to update the runsettings file with a targetframework version matching the framework of the unit test project (4.6.2). I just can't figure out what the magic string is.
Here's the starting point:
<!-- Configurations that affect the Test Framework -->
<RunConfiguration>
<!-- Path relative to solution directory -->
<ResultsDirectory>.\TestResults</ResultsDirectory>
<!-- [x86] | x64
- You can also change it from menu Test, Test Settings, Default Processor Architecture -->
<TargetPlatform>x64</TargetPlatform>
<!-- Framework35 | [Framework40] | Framework45 -->
<TargetFrameworkVersion>Framework45</TargetFrameworkVersion>
<!--
TargetFrameworkVersion needs to be updated, but documentation is unclear on how
cf. https://github.com/Microsoft/vstest-docs/issues/163
<TargetFrameworkVersion>.NETFramework,Version=v4.6.2</TargetFrameworkVersion>
-->
</RunConfiguration>
Every value I can find to try results in the following exception:
[6/7/2019 8:34:20 PM Error] Failed to configure settings for runsettings plugin 'VSTest Run Configuration' as it threw following exception:
'An error occurred while loading the settings. Error: Invalid setting 'RunConfiguration'. Invalid value 'net462' specified for 'TargetFrameworkVersion'..'
Please contact the plugin author.
[6/7/2019 8:34:20 PM Diagnostic] Generate test run settings exception:System.Xml.XmlException: An error occurred while loading the settings. Error: Invalid setting 'RunConfiguration'. Invalid value 'net462' specified for 'TargetFrameworkVersion'..
at Microsoft.VisualStudio.TestWindow.VSTest.TestRunSettingsService.ValidateRunConfigurationSettings(XPathNavigator runSettingsNavigator)
at Microsoft.VisualStudio.TestWindow.VSTest.TestRunSettingsService.MergeRunSettingsAndFindCompatibleSources(Architecture& platform, FrameworkVersion& framework, String resultsDirectory, String solutionDirectory, IDictionary`2 sourceSettings, IXPathNavigable inputRunSettings, String& incompatibleSourcesWarning)
at Microsoft.VisualStudio.TestWindow.VSTest.TestRunSettingsService.AddRunSettings(IXPathNavigable inputRunSettingDocument, IRunSettingsConfigurationInfo configurationInfo, ILogger log)
at Microsoft.VisualStudio.TestWindow.Controller.Request.GenerateTestRunSettings(RunSettingConfigurationInfoState infoState)
Values I've tried:
.NETFramework,Version=v4.6
.NETFramework,Version=v4.6.2
v4.6.2
net46
net462
Framework46
Similar:
https://developercommunity.visualstudio.com/content/problem/236358/vstestconsoleexe-in-testwindow-on-1570-preview-3-d.html
https://github.com/Microsoft/vstest-docs/issues/163
https://developercommunity.visualstudio.com/content/problem/579073/test-discovery-reporting-dlls-do-not-match.html

Answer 1

Had same issue with Framework 4.6.1 tests. Since the original post, the page referenced by the https://developercommunity.visualstudio.com/content/problem/579073/test-discovery-reporting-dlls-do-not-match.html link was updated with a note that the issue is fixed in Visual Studio 16.2, which was released July 24. I upgraded, removed the entire RunConfiguration section from the .runsettings file, and now the unit tests run without error.

Answer 2

I simply removed "TargetFrameworkVersion" and it worked in my case. I guess Visual Studio auto selects the correct framework if this field is not specified.
<!-- Configurations that affect the Test Framework -->
<RunConfiguration>
<!-- Path relative to solution directory -->
<ResultsDirectory>.\TestResults</ResultsDirectory>
<!-- [x86] | x64
- You can also change it from menu Test, Test Settings, Default Processor Architecture -->
<TargetPlatform>x64</TargetPlatform>
</RunConfiguration>