How do I replace the *first instance* of a string in .NET?

Question

I want to replace the first occurrence in a given string.

How can I accomplish this in .NET?

Answer 1

C# extension method that will do this:

public static class StringExt
{
    public static string ReplaceFirstOccurrence(this string s, string oldValue, string newValue)
    {
         int i = s.IndexOf(oldValue);
         return s.Remove(i, oldValue.Length).Insert(i, newValue);    
    } 
}

Enjoy