C# How to replace Microsoft's Smart Quotes with straight quotation marks?

Question

My post below asked what the curly quotation marks were and why my app wouldn\'t work with them, my question now is how can I replace them when my program comes across them,

Answer 1

I also have a program which does this, the source is in this file of CP-1252 Fixer. It additionally defines some mappings for converting characters within RTF strings whilst preserving all formatting, which may be useful to some.

It is also a complete mapping of all "smart quote" characters to their low-ascii counterparts, entity codes and character references.