public static void PrintPrettyResult(CalculationInt calc) { Dictionary <int, int> data = new Dictionary <int, int>() { { 2, 3 }, { 4, 5 }, { 6, 7 }, { 10, 11 }, { 7, 3 } }; foreach (int key in data.Keys) { int x = key; int y = data[key]; int r = calc(x, y); Console.WriteLine($"{key} ,{data[key]} = {r}"); } }