static void Main(string[] args) { decimal[] test1 = { 1, 2, 3, 4, 5, 6, 10, 1, 6, 6 }; Console.WriteLine(test1.Act((d) => d.Sum())); test1.Act((d) => Console.WriteLine(d.Sum())); Console.WriteLine(test1.TotalSum()); Console.WriteLine(test1.AverageValue()); Console.WriteLine(test1.FrequentValue()); Console.ReadKey(); }