using System;

​

public class Program

{

    public static void Main()

    {

        var p = new Program();

        for (var i = 0; i < 100; ++i)

        {

            p.restartCount = i;

            Console.WriteLine("{0} {1}", i, p.GetRestartDelay());

        }

    }

​

    public TimeSpan InitialRestartDelay = TimeSpan.FromSeconds(30);

    public TimeSpan MaximumRestartWait = TimeSpan.FromMinutes(10);

    public int restartCount;

    TimeSpan GetRestartDelay()

    {

        var restartDelaySeconds = this.InitialRestartDelay.TotalSeconds * Math.Pow(2.0, this.restartCount - 1);

        restartDelaySeconds = Math.Min(MaximumRestartWait.TotalSeconds, restartDelaySeconds);

        return TimeSpan.FromSeconds(restartDelaySeconds);

    }

}