In addition to what m_fayer says, you can also bind native libs and make the same adjustments, so most native controls written in Objective-C or Java are basica

In addition to what m_fayer says, you can also bind native libs and make the same adjustments, so most native controls written in Objective-C or Java are basically drop-in (bindings are already available for most common components on NuGet, but they're almost trivial to write) Binding Swift libraries is a pain though