Remove text after a string occurrence

Question

I have a string that has the following format:

string sample = \"A, ABC, 1, ACS,,\"

As you can see, there are 5 occurences of the ,

Answer 1

Assuming that you want to return the full string if there aren't enough commas to satisfy the count

String fx(String str, Int32 commaCount) 
    {
        if (String.IsNullOrEmpty(str)) return str;
        var i = 0;
        var strLength = str.Length;
        while ((commaCount-- > 0) && (i != -1) && (i < strLength)) i = str.IndexOf(",", i + 1);
        return (i == -1 ? str : str.Substring(i));
    }