Once upon a long time ago we decided to mark the properties in the
UITextInputTraits protocol as required in our API definition, because that way
we'd inline these properties in any class that implemented the
UITextInputTraits protocol, which made calling these properties much easier.
At a later point, we implemented better support for protocols, and now we
automatically generate extension methods for such properties (a corresponding
Get/Set method for the get/set property accessors), so we don't need these
inlined properties anymore.
However, removing them would be a breaking change, so we were stuck with these
redundant inlined properties, until .NET came along.
Ref: 0e80570863
Fixes https://github.com/xamarin/xamarin-macios/issues/5831.
* Fix system version checks to work properly on Mac Catalyst (which uses the macOS
version as its system version).
* Add the framework-specific defines to the build for monotouch-test.csproj (using
the generated response files), this way we can use them in the tests.
* Sprinkle conditionals in numerous places - I tried using either framework-specific
or XAMCORE_3_0 whenever that made since (instead of using Mac Catalyst as a condition).
* Updated a few tests to use non-deprecated API (because the deprecated API often
doesn't exist in Mac Catalyst).
* Also a few minor API fixes to make any corresponding tests compile.
Rolf Bjarne Kvinge
Timothy Risi