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

Using Nick and Barbara's answers, here is example code with performance stats for 1,000,000 loops on my machine:

input = "shmB6BhLe0gdGU8OxYykZ21vuxLjBo5I1ZTJjxWfyRTTlqQlgz0yUtPu8iNCCcsx78EPsObiPkCpRT8nqRtvM3Bku1f9nStmigaw";
input.Replace('\u2013', '-'); // en dash
input.Replace('\u2014', '-'); // em dash
input.Replace('\u2015', '-'); // horizontal bar
input.Replace('\u2017', '_'); // double low line
input.Replace('\u2018', '\''); // left single quotation mark
input.Replace('\u2019', '\''); // right single quotation mark
input.Replace('\u201a', ','); // single low-9 quotation mark
input.Replace('\u201b', '\''); // single high-reversed-9 quotation mark
input.Replace('\u201c', '\"'); // left double quotation mark
input.Replace('\u201d', '\"'); // right double quotation mark
input.Replace('\u201e', '\"'); // double low-9 quotation mark
input.Replace("\u2026", "..."); // horizontal ellipsis
input.Replace('\u2032', '\''); // prime
input.Replace('\u2033', '\"'); // double prime

Time: 958.1011 milliseconds

input = "shmB6BhLe0gdGU8OxYykZ21vuxLjBo5I1ZTJjxWfyRTTlqQlgz0yUtPu8iNCCcsx78EPsObiPkCpRT8nqRtvM3Bku1f9nStmigaw";
var inputArray = input.ToCharArray();
for (int i = 0; i < inputArray.Length; i++)
{
    switch (inputArray[i])
    {
        case '\u2013':
            inputArray[i] = '-';
            break;
        // en dash
        case '\u2014':
            inputArray[i] = '-';
            break;
        // em dash
        case '\u2015':
            inputArray[i] = '-';
            break;
        // horizontal bar
        case '\u2017':
            inputArray[i] = '_';
            break;
        // double low line
        case '\u2018':
            inputArray[i] = '\'';
            break;
        // left single quotation mark
        case '\u2019':
            inputArray[i] = '\'';
            break;
        // right single quotation mark
        case '\u201a':
            inputArray[i] = ',';
            break;
        // single low-9 quotation mark
        case '\u201b':
            inputArray[i] = '\'';
            break;
        // single high-reversed-9 quotation mark
        case '\u201c':
            inputArray[i] = '\"';
            break;
        // left double quotation mark
        case '\u201d':
            inputArray[i] = '\"';
            break;
        // right double quotation mark
        case '\u201e':
            inputArray[i] = '\"';
            break;
        // double low-9 quotation mark
        case '\u2026':
            inputArray[i] = '.';
            break;
        // horizontal ellipsis
        case '\u2032':
            inputArray[i] = '\'';
            break;
        // prime
        case '\u2033':
            inputArray[i] = '\"';
            break;
        // double prime
    }
}
input = new string(inputArray);

Time: 362.0858 milliseconds