You can absolutely write C# that reads close to natural language. I do so on a daily basis.

Legalese is a bit of a non-sequitur. Despite English legalese ostenisbly being written in English, it is specifically obfuscated, using terminology that is not encountered in everyday English so as to be more difficult for laymen to understand. In fact it is common for legalese to use English that is not English, that is, words that look like English words but have completely different definitions that are not in accord with how those words are used in regular communication.