BinaryFormatter Migration Guide: Formatting, exception type, API links

[jeffhandley]

For the BinaryFormatter Migration Guide:

1. Specify the exception that is thrown (PlatformNotSupportedException)
2. Change WinForms/WPF "applications" to "apps"
3. Add spacing between bulleted lines on the MessagePack page (matching the System.Text.Json page's formatting to give space between each statement in the list)
4. Add API docs links, especially to the NrbfDecoder APIs
5. Fix broken links to the BinaryFormatter security guide

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Internal previews

📄 File	🔗 Preview link
docs/standard/serialization/binaryformatter-migration-guide/choose-a-serializer.md	docs/standard/serialization/binaryformatter-migration-guide/choose-a-serializer
docs/standard/serialization/binaryformatter-migration-guide/functionality-reference.md	docs/standard/serialization/binaryformatter-migration-guide/functionality-reference
docs/standard/serialization/binaryformatter-migration-guide/index.md	docs/standard/serialization/binaryformatter-migration-guide/index
docs/standard/serialization/binaryformatter-migration-guide/migrate-to-messagepack.md	docs/standard/serialization/binaryformatter-migration-guide/migrate-to-messagepack
docs/standard/serialization/binaryformatter-migration-guide/read-nrbf-payloads.md	docs/standard/serialization/binaryformatter-migration-guide/read-nrbf-payloads
docs/standard/serialization/binaryformatter-migration-guide/winforms-applications.md	docs/standard/serialization/binaryformatter-migration-guide/winforms-applications
docs/standard/serialization/binaryformatter-migration-guide/winforms-wpf-ole-guidance.md	docs/standard/serialization/binaryformatter-migration-guide/winforms-wpf-ole-guidance
docs/standard/serialization/binaryformatter-migration-guide/wpf-applications.md	docs/standard/serialization/binaryformatter-migration-guide/wpf-applications

[terrajobst]

Thanks for fixing those, looks great!

[jeffhandley]

OK -- the links to the binaryformatter-security-guide are finally correct. It required:

1. Absolute link starting with /dotnet/standard/...
2. Removing the .md file extension

[BillWagner]

This overall looks good.

I think it would be better to use the xref style links rather than the page links for API reference.

[terrajobst]

@BillWagner I've replaced all use of links to API with xref.