Remove extra commas in C#

Question

I have a string like "abc,,bcd,";

The output should be abc,bcd i.e. the extra commas should be removed.

Help needed

Answer 1

string result = Regex.Replace(input, ",+", ",").Trim(',');

Answer 2

How about something like

string s = "abc,,bcd,";
s = s.Trim(',');
while (s.Contains(",,"))
    s = s.Replace(",,", ",");