Convert characters to web safe

I'm taking some input from the user using a standard <asp:textbox...

I'm creating a textfile from the contents of the textbox and save it as .html. This works fine, however if the user enters some dodgy characters, such as this: “cover story.”

This turns the html into looking like this: “cover story.â€

If i open the file up in notepad and then save it all is fixed.

How can i get around this issue?  
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Man, if you do following:
using (StreamWriter writer = File.CreateText(Server.MapPath("~/test.html")))        

You will not receive encoding problems.
So, what is the way you are saving textbox text?
Carl TawnSystems and Integration DeveloperCommented:
Can you show the code you are using to write to file? It sounds like a problem with the Encoding.
Type25Author Commented:
Excuse the formatting
                    int randNumber = RandomNumber(minRand, maxRand);
                    htmlFilename = randNumber + "_article.html";

                    if (!File.Exists(articleLocation + htmlFilename))
                        // Create HTML File

                        TextWriter tw = new StreamWriter(articleLocation + htmlFilename);

                        tw.WriteLine(@"<html><title>" + articleTitle + "</title>");
                        tw.WriteLine(@"<meta name=""apple-mobile-web-app-capable"" content=""yes""><meta name = ""viewport"" content = ""initial-scale = 1.0,  user-scalable = no"">");
                        tw.WriteLine(@"<style>body { width:310px; } .copy {font-family:Calibri,Arial; font-size:16px;background:url(../MagWatermarks/" + customerName + ".gif);  }h2 {font-family:Arial,Calibri;font-size:26px; font-weight:none; } .caption {color:Gray;font-size:13px;font-family:Arial;}</style>");
                        tw.WriteLine(@"<h2>" + articleTitle + "</h2>");
                        tw.WriteLine(@"<img src='" + picLocation + "iphone-" + articleImageURL + "' style='padding-left:2px'>");
                        tw.WriteLine(@"<span class=caption>" + caption + "</span>");
                        tw.WriteLine(@"<br><br><div class=copy>" + articleCopy + "</span>");
                        tw.WriteLine(@"<div style=""font-family:Calibri;width:304;height:30px;background:WhiteSmoke;padding-top:4px;font-family:Calibri;text-align:center""><a href='" + linkURL + "'>" + linkName + "</a></div>");


                        done = true;


                while (!done);

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Again, I do not have any problems with encoding in this code.
What exactly causes encoding error (articleTiitle, caption, etc)?  How do you get those values?
Type25Author Commented:
It's articleCopy but i would presume it's the same for all of them.

ArticleCopy is the only text field that is multiline if that makes any difference.. ?

Retrieve the field like normal,  articleCopy.Text
Change the line:

                    TextWriter tw = new StreamWriter(articleLocation + htmlFilename, Encoding.UTF8);


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Type25Author Commented:
Spot on!
Yes, that should work - File.CreateText do same thing about encoding.
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