Most reliable split character

Question

Update

If you were forced to use a single char on a split method, which char would be the most reliable?

Definition of reliable: a split charact

Answer 1

Aside from 0x0, which may not be available (because of null-terminated strings, for example), the ASCII control characters between 0x1 and 0x1f are good candidates. The ASCII characters 0x1c-0x1f are even designed for such a thing and have the names File Separator, Group Separator, Record Separator, Unit Separator. However, they are forbidden in transport formats such as XML.

In that case, the characters from the unicode private use code points may be used.

One last option would be to use an escaping strategy, so that the separation character can be entered somehow anyway. However, this complicates the task quite a lot and you cannot use String.Split anymore.