using System.Security.Cryptography;

using System;

​

​

for(var i = 0; i <=2;i++) {

    var attemptNum = i;

    var value = RandomNumberGenerator.GetInt32(10, (int) Math.Pow(Math.E, attemptNum) * 200);

    Console.WriteLine("atempt : " +attemptNum + " value: " + value);

    Console.WriteLine(TimeSpan.FromMilliseconds(value));

}

​

​