Template in Visual Studio that adds a DiagnosticSource binding redirect in web.config, but doesn’t publish the assembly

[SergeyKanzhelev]

The issue is caused by a broken template in Visual Studio that adds a DiagnosticSource binding redirect in web.config, but doesn’t publish the assembly.

<dependentAssembly>
        <assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.2.1" newVersion="4.0.2.1" />
      </dependentAssembly>

Workaround if to remove that dependentAssembly node. VS folks are aware of the problem and they have a fix for it in 15.9.1

We may need to fix it by not crash if DiagnosticsSource cannot be found.