What is the regex to match a string not containing more than x consecutive characters

Question

I want to match strings that do not contain more than 3 of the same character repeated in a row. So:

• abaaaa [no match]
• abawdasd [match]
• abbbbasda

Answer 1

I'm answering this question :

Is there a regular expression for matching a string that has no more than 2 repeating characters?

which was marked as an exact duplicate of this question.

---

Its much quicker to negate the match instead

if (!Regex.Match("hello world", @"(.)\1{2}").Success) Console.WriteLine("No dups");