ssajous

public static double DiceCoefficient(string stOne, string stTwo)
{
	HashSet<string> nx = BuildBigramSet(stOne);
	HashSet<string> ny = BuildBigramSet(stTwo);

	HashSet<string> intersection = new HashSet<string>(nx);
	intersection.IntersectWith(ny);

	double dbOne = intersection.Count;
	return (2 * dbOne) / (nx.Count + ny.Count);