Polly 7.0.1

7.0.1 --------------------- - Explicitly state System.ValueTuple dependency in nuspec (for Net Standard 1.1)

 7.0.0
 ---------------------
 - Clarify separation of sync and async policies (breaking change)
 - Enable extensibility by custom policies hosted external to Polly
 - Enable collection initialization syntax for PolicyRegistry
 - Enable cache policies to cache default(TResult) (breaking change)
 - Restore Exception binary serialization for .Net Standard 2.0

 6.1.2
 ---------------------
 - Bug Fix: Async continuation control for async executions (issue 540, affected only v6.1.1)

 6.1.1
 ---------------------
 - Bug Fix: Context.PolicyKey behaviour in PolicyWrap (issue 510)

 6.1.0
 ---------------------
 - Bug Fix: Context.PolicyKey behaviour in PolicyWrap
 - Bug Fix: CachePolicy behaviour with non-nullable types
 - Enhancement: WaitAnd/RetryForever overloads where onRetry takes the retry number as a parameter
 - Enhancement: Overloads where onTimeout takes thrown exception as a parameter

 6.0.1
 ---------------------
 - Version 6 RTM, for integration to ASPNET Core 2.1 IHttpClientFactory

 6.0.0-v6alpha
 ---------------------
 - Publish as strong-named package only (discontinue non-strong-named versions)
 - Add .NetStandard 2.0 tfm
 - Provide .NET4.5 support via .NetStandard 1.1 tfm
 - Discontinue .NET4.0 support
 - Remove methods marked as deprecated in v5.9.0

 5.9.0
 ---------------------
 - Allow Timeout.InfiniteTimeSpan (no timeout) for TimeoutPolicy. 
 - Add .AsPolicy<TResult> and .AsAsyncPolicy<TResult> methods for converting non-generic policies to generic policies.
 - Per Semver, indicates deprecation of overloads and properties intended to be removed or renamed in Polly v6.

 5.8.0
 ---------------------
 - Add a new onBreak overload that provides the prior state on a transition to an open state
 - Bug fix: RelativeTtl in CachePolicy now always returns a ttl relative to time item is cached
        
 5.7.0
 ---------------------
 - Minor cache fixes
 - Add ability to calculate cache Ttl based on item to cache
 - Allow user-created custom policies

 5.6.1
 ---------------------
 - Extend PolicyWrap syntax with interfaces

 5.6.0
 ---------------------
 - Add ability to handle inner exceptions natively: .HandleInner<TEx>()
 - Allow WaitAndRetry policies to calculate wait based on the handled fault
 - Add the ability to access the policies within an IPolicyWrap
 - Allow PolicyWrap to take interfaces as parameters
 - Bug fix: set context keys for generic execute method with PolicyWrap
 - Bug fix: generic TResult method with non-generic fallback policy
 - Performance improvements

 5.5.0
 ---------------------
 - Bug fix: non-generic CachePolicy with PolicyWrap
 - Add Cache interfaces
 
 5.4.0
 ---------------------
 - Add CachePolicy: cache-aside pattern, with interfaces for pluggable cache providers and serializers.
 - Bug fix: Sync TimeoutPolicy in pessimistic mode no longer interposes AggregateException.
 - Provide public factory methods for PolicyResult, to support testing.
 - Fallback delegates can now take handled fault as input parameter.

 5.3.1
 ---------------------
 - Make ISyncPolicy<TResult> public
 - (Upgrade solution to msbuild15)

 5.3.0
 ---------------------
 - Fix ExecuteAndCapture() usage with PolicyWrap   
 - Allow Fallback delegates to take execution Context
 - Provide IReadOnlyPolicyRegistry interface

 5.2.0
 ---------------------
 - Add PolicyRegistry for storing and retrieving policies.
 - Add interfaces by policy type and execution type.
 - Change .NetStandard minimum support to NetStandard1.1.

 5.1.0
 ---------------------
 - Allow different parts of a policy execution to exchange data via a mutable Context travelling with each execution.

 5.0.6
 ---------------------
 - Update NETStandard.Library dependency to latest 1.6.1 for .NetStandard1.0 target.  Resolves compatibility for some Xamarin targets.

 5.0.5
 ---------------------
 - Bug fix: Prevent request stampede during half-open state of CircuitBreaker and AdvancedCircuitBreaker.  Enforce only one new trial call per break duration, during half-open state.
 - Bug fix: Prevent duplicate raising of the onBreak delegate, if executions started when a circuit was closed, return faults when a circuit has already opened.
 - Optimisation: Optimise hotpaths for Circuit-Breaker, Retry and Fallback policies.
 - Add NoOpPolicy: NoOpPolicy executes delegates without intervention; for eg stubbing out Polly in unit testing.

 5.0.4 pre
 ---------------------
 - (.NET40Async package changes only)

 5.0.3 RTM
 ---------------------
 - Refine implementation of cancellable synchronous WaitAndRetry
 - Minor breaking change: Where a user delegate does not observe cancellation, Polly will now honour the delegate's outcome rather than throw for the unobserved cancellation (issue 188).

 5.0.2 alpha
 ---------------------
 - .NETStandard1.0 target: Correctly state dependencies. 
 - .NETStandard1.0 target: Fix SemVer stamping of Polly.dll.
 - PCL259 project and target: Remove, in favour of .NETStandard1.0 target.  PCL259 targets are still supported, via .NETStandard1.0 target.
 - Mark Polly.dll as CLSCompliant.
 
 5.0.1 alpha
 ---------------------
 - Add a .NETStandard1.0 target.

 5.0.0 alpha
 ---------------------
 A major release, adding significant new resilience policies:
 - Timeout policy: allows timing out any execution
 - Bulkhead isolation policy: limits the resources consumable by governed actions, such that a faulting channel cannot cause cascading failures.
 - Fallback policy: provides for a fallback execution or value, in case of overall failure
 - PolicyWrap: allows flexibly combining Policy instances of any type, to form an overall resilience strategy.

 Other changes include:
 - Add PolicyKeys and context to all policy executions, for logging and to support later introduction of policy events and metrics. 
 - Add CancellationToken support to synchronous executions.
 - Add some missing ExecuteAndCapture/Async overloads. 
 - Remove invalid ExecuteAsync overloads taking (but not making use of) a CancellationToken
 - Provide .NET4.0 support uniquely through Polly.NET40Async package
 - Retire ContextualPolicy (not part of documented API; support now in Policy base class)
 - Discontinue .NET3.5 support

 Earlier versions
 ----------------
 For versions prior to v5.0, please see the detailed ChangeLog on the Polly project site.