"Insufficient Granularity with Locks"

private static readonly object wordCountCalculatorSyncObj = new object();

private static void ThreadDoWork() {
	lock (wordCountCalculatorSyncObj) {
		bool atLeastOneWordRemaining;
		int thisWordIndex = currentWordIndex;
		currentWordIndex = currentWordIndex + 1;
		if (thisWordIndex >= wordList.Count) atLeastOneWordRemaining = false;
		else atLeastOneWordRemaining = true;

		while (atLeastOneWordRemaining) {
			string thisWord = wordList[thisWordIndex];
			bool firstOccurrenceOfWord = !wordCountDict.ContainsKey(thisWord);

			if (curseWords.Contains(thisWord)) Console.WriteLine("Curse word detected!");
			if (firstOccurrenceOfWord) wordCountDict.Add(thisWord, 1);
			else wordCountDict[thisWord] = wordCountDict[thisWord] + 1;

			thisWordIndex = currentWordIndex;
			currentWordIndex = currentWordIndex + 1;
			if (thisWordIndex >= wordList.Count) atLeastOneWordRemaining = false;
		}
	}
}