Polly sample

PollySample.cs

using System;
using Polly;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            // Retry a specified number of times, using a function to 
            // calculate the duration to wait between retries based on 
            // the current retry attempt (allows for exponential backoff)
            // In this case will wait for
            //  2 ^ 1 = 2 seconds then
            //  2 ^ 2 = 4 seconds then
            //  2 ^ 3 = 8 seconds then
            //  2 ^ 4 = 16 seconds
            try
            {
                var retryPolicy = Polly.Policy.Handle<DivideByZeroException>(e =>
                {
                    // Here we can do some exception handling
                    Console.WriteLine("Handling Devide by zero exception");
                    return true;
                }).WaitAndRetry(4, retryAttempt =>
                    {
                        Console.WriteLine($"Retrying attempt {retryAttempt}");
                        return TimeSpan.FromSeconds(Math.Pow(2, retryAttempt));
                    }
                );

                retryPolicy.Execute(Divide);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Handling the exception {ex.ToString()}"); // Dumb handle not to crash
            }

            Console.ReadKey();
        }

        private static void Divide()
        {
            int a = 10;
            int b = 0;
            var c = a / b; // 0 divide exception!
            // todo uncomment this line to see that any other type of exception will be just not handled by our policy
            //throw new AccessViolationException("TEST");
        }
    }
}