Regex Replace - Multiple Characters

I have 20 or so characters that I need to replace with various other characters in a block of text. Is there a way to do this in a single regex, and what would this regex be? Or is there an easier way to do this in .NET?

For example, an excerpt from my mapping table is

œ => oe
ž => z
Ÿ => Y
À => A
Á => A
 => A
à => A
Ä => AE

From stackoverflow

• I'm not aware of an easy way to do it using regex(not sure it is possible) but here is a clean way to do it:

  var replaceChars = new Dictionary<string, string>
                     {
                         {"œ", "oe"},
                         {"ž", "z"}
                     };
  string s = "ždfasœ";
  
  foreach (var c in replaceChars)
      s = s.Replace(c.Key, c.Value);
  
  Console.WriteLine(s);
  

  Joe : StringBuilder would be a better solution.

• http://stackoverflow.com/questions/249087/how-do-i-remove-diacritics-accents-from-a-string-in-net

  Nicolas Webb : This likely addresses the actual need of the questioner. I'll have to keep that around.

• For string replacement, I'd just iterate through these in your mapping table and use string.Replace on them:

  foreach(var r in replacements.Values)
  {
      myString.Replace(r.Key, r);
  }
  

  Not the most performant, but if you don't have a lot of strings to go through it should be good enough :).

• If you really like to do it in single regex, there is way to do that.

  Dictionary<string, string> map = new Dictionary<string, string>() {
      {"œ","oe"},
      {"ž", "z"},
      {"Ÿ","Y"},
      {"À","A"},
      {"Á","A"},
      {"Â","A"},
      {"Ã","A"},
      {"Ä","AE"},
  };
  
  string str = "AAAœžŸÀÂÃÄZZZ";
  
  Regex r = new Regex(@"[œžŸÀÂÃÄ]");
  
  string output = r.Replace(str, (Match m) => map[m.Value]);
  
  Console.WriteLine(output);
  

  Result

  AAAoezYAAAAEZZZ
  

  serhio : is this more or less resources and time consuming that string.replace("œ","oe"), etc...?

  S.Mark : Normal string replace should be faster than regex