alt Hacker NewsNor any semicolons. Also full of nonsense. SWF fundamentally runs action script. The idea that you are going to have a AS3 to C# transpiler and a C# scripting engine AND export SWFs is incongruous. Again, "C# code executed when the playhead enters a keyframe." Now I'd love the oppurinity to learn, but ctrl+f c# here [1] shows 0 results. Though I'm sure I'm just misunderstanding the meaning here ( ≖_≖).
only thing I can imagine is that they are building it with Unity, hence the C#. You can compile other languages to SWF bytecode, that's what Haxe is.