Wpf: PresentationTraceSources.TraceLevel not found

[stefanolson]

• .NET Core Version: 3.0 Preview1
• Windows version: 10, 1803

• Does the bug reproduce also in WPF for .NET Framework 4.8?: No (well not on 4.5 for sure)

  Problem description:
  attempting to use PresentationTraceSources.TraceLevel causes failure to compile with the error:
  error MC3045: Unknown property 'PresentationTraceSources.TraceLevel' for type 'System.Windows.Data.Binding' encountered while parsing a Markup Extension.

Works fine in WPF on the .net framework.

Expected behavior:
Should compile and run and trace bindings

Minimal repro:
<TextBox Grid.Row="0" Text="{Binding PresentationTraceSources.TraceLevel=High}" Grid.Column="1"/>

Stefan

[rladuca]

@stefanolson Thanks for reporting this, I don't believe we've tested the trace sources at this point.

@ryalanms This looks like a PBT issue, can you take a look when you get a chance?

[rladuca]

@ryalanms I looked a little further into this, and I think it's not PBT, but rather missing xmlns definitions in the WindowsBase ref assembly. I'll assign this over to myself and see about fixing it tomorrow.

@stefanolson The problem is likely in code we haven't open sourced just yet. Once fixed, it should appear in the daily builds, I'll let you know so you can verify.

[rladuca]

@stefanolson I've filed an overarching issue to track work to sweep all the xmlns issues. Please track the progress there.

[rladuca]

Duplicate of #119