How to write a reader of .map files from Delphi in C#?

I am attempting to make a .map file reader in a different programming language (c#). This is because a friend of mine has a whole load of .map files he wants to use in Unity. Now, what (I think) happens is that the Delphi level editor stores the level as a series of symbols. The level editor then 'reads' this series of symbols, and constructs a map on them. So this series of symbols is a 开发者_运维问答save file, I suppose.

Now, what I want to do is reconstruct this reader in c#. Therefore I have to find the relevant code, and what reads the symbols. However, I don't know the Delphi language - so I need to know how the symbol conversion works, and what each symbol is converted to. Any links/advice/answers are appreciated. I will post the source code if necessary, but it's quite long.