How to check repeated letters in a string c#

I am creating a program that checks repeated letters in a string. For Example: wooooooooooow happpppppppy This is my code: ``` string repeatedWord = "woooooooow"; for (int i = 0; i < repeatedWord.Count(); i++) { if (repeatedWord[i] == repeatedWord[i+1]) { // .... } } ``` The code works but it will always have an error because the last character `[i + 1]` is empty/null. The error is Index was outside the bounds of the array. Any solution for this?