public static ItemsetCollection FindSubsets(Itemset itemset, int n) { var subsets = new ItemsetCollection(); int subsetCount = (int)Math.Pow(2, itemset.Count); for (int i = 0; i < subsetCount; i++) { if (n == 0 || GetOnCount(i, itemset.Count) == n) { string binary = DecimalToBinary(i, itemset.Count); Itemset subset = new Itemset(); for (int charIndex = 0; charIndex < binary.Length; charIndex++) { if (binary[charIndex] == '1') { subset.Add(itemset[charIndex]); } } subsets.Add(subset); } } return(subsets); }