using System;
using System.Collections.Generic;
using System.Text;
class Util {
public static int Sum(params int[] paramList) {
if (paramList == null) {
throw new ArgumentException("Util.Sum: null parameter list");
}
if (paramList.Length == 0) {
throw new ArgumentException("Util.Sum: empty parameter list");
}
int sumTotal = 0;
foreach (int i in paramList) {
sumTotal += i;
}
return sumTotal;
}
}
class Program {
static void Entrance() {
Console.WriteLine(Util.Sum(10, 9, 8, 7, 6, 5, 4, 3, 2, 1));
}
static void Main() {
try {
Entrance();
} catch (Exception ex) {
Console.WriteLine("Exception: {0}", ex.Message);
}
}
}
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