Polly

source: https://github.com/App-vNext/Polly

Using Polly for Exponential Backdown

Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner.

Minimal Code Sample

// Single exception type
Policy.Handle<HttpRequestException>(); // Retry once
 
Policy
	.Handle<SomeExceptionType>()
	.Retry(); // Retry, waiting a specified duration between each retry.
 
// (The wait is imposed on catching the failure, before making the next try.)
 
Policy
	.Handle<SomeExceptionType>()
	.WaitAndRetry(new[]
	{
		TimeSpan.FromSeconds(1),
		TimeSpan.FromSeconds(2),
		TimeSpan.FromSeconds(3)
	});   // Execute an action
 
var policy = Policy
	.Handle<SomeExceptionType>()
	.Retry();
 
policy.Execute(() => DoSomething());