The TL;DR version is that they don't really use classes and inheritance (which is the part that would be hard to map to Go but easy to map to C#). It's all func

The TL;DR version is that they don't really use classes and inheritance (which is the part that would be hard to map to Go but easy to map to C#). It's all functions dealing with struct-like objects. The other part of it is that C# is very firmly in the nominal typing camp, while TS is entirely structurally typed. Go can do both.