MAUI is cross platform for every platform most businesses care about (mobile+Windows+macOS). For the rest, there's Avalonia (and a bunch of alternatives, but Av

MAUI is cross platform for every platform most businesses care about (mobile+Windows+macOS). For the rest, there's Avalonia (and a bunch of alternatives, but Avalonia comes closest to Microsoft's systems I think). You won't be writing visual bootloaders in plain C# any time soon, but the GUI side of C# is fine