I wish I could say I was the clever one to think of this but I ran into it in my copy of the Python Cookbook (the original author is Xavier Defrang, the Python implementation here). It's cool enough that I ported it today - I'll know I'll use the C# implementation of it quite often:

        static string MultipleReplace(string text, Dictionary replacements) {
return Regex.Replace(text,
"(" + String.Join("|", adict.Keys.ToArray()) + ")",
delegate(Match m) { return replacements[m.Value]; }
// somewhere else in code
string temp = "Jonathan Smith is a developer";
adict.Add("Jonathan", "David");
adict.Add("Smith", "Seruyange");
string rep = MultipleReplace(temp, adict);



Hi! Your code works well with simple replacement but will fail with complex pattern as the dictionnary key will not be the pattern but the matched string in the input.
Chris Partridge
This is great, thank you!