The C# Program
using System;
namespace ConsoleApplication2
{class Class1{static void Main(string[] args) {
int
i;long result,ticks; double seconds; const long limit=100000000;
result=0;ticks=DateTime.Now.Ticks;
Console.WriteLine("Start");
for
(i=1;i<=100000000;i++) result=result+i;
seconds=(DateTime.Now.Ticks-ticks)/10000000.0;
Console.WriteLine("End"+
"\n"+seconds.ToString()+
"
seconds for sum from 1 to "+(object)limit.ToString()+
"\nSum
= "+result.ToString()+
"\nEuler
forumula n(n+1)/2 = "+(limit*(limit+1)/2).ToString());}
}
}