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

When I encountered this problem I wrote an extension method to the String class in C#.

public static class StringExtensions
{
    public static string StripIncompatableQuotes(this string s)
    {
        if (!string.IsNullOrEmpty(s))
            return s.Replace('\u2018', '\'').Replace('\u2019', '\'').Replace('\u201c', '\"').Replace('\u201d', '\"');
        else
            return s;
    }
}

This simply replaces the silly 'smart quotes' with normal quotes.

[EDIT] Fixed to also support replacement of 'double smart quotes'.