Missing a working example

I would appreciate to see a working example here. It is a bit hard to put all code fragments at the right spot. Also using two unrelated examples is not very helpful.

---
#### Document Details

⚠ *Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.*

* ID: 656cfb37-27e3-c249-ef92-6fc52aa972d8
* Version Independent ID: f795ea30-a188-9b2e-a411-568935347be9
* Content: [How to: Filter Data in a View - WPF .NET Framework](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/data/how-to-filter-data-in-a-view?view=netframeworkdesktop-4.8)
* Content Source: [dotnet-desktop-guide/framework/wpf/data/how-to-filter-data-in-a-view.md](https://github.com/dotnet/docs-desktop/blob/master/dotnet-desktop-guide/framework/wpf/data/how-to-filter-data-in-a-view.md)
* Product: **dotnet-framework**
* Technology: **dotnet-wpf**
* GitHub Login: @adegeo
* Microsoft Alias: **adegeo**