• {New} Supports .NET 4.5.0, .NET Standard 1.4, 1.6 and 2.0
• {New} Include the name of the subject-under-test from the C# code in the failure message - #705
• {New} Added NotBeInRange, NotHaveSameCount, NotApproximately, NotBeAssignableTo to the numeric assertions - #598, #599, #600, #601
• {New} Added [Not]Have{Implicit,Explicit}ConversionOperator, NotBeDecoratedWith and ThatAreNotDecoratedWith to the type assertions - #604, #609
• {New} Added NotHaveCount, HaveCount{Greater,Less}{Than,OrEqualTo} to the numeric assertions - #618
• {New} Report all indices offending collection.Should().NotContainNulls - #608
• {New} Added predicate overload to OnlyHaveUniqueItems and NotContainNull collection assertions - #611
• {New} Fail fast on NotIntersectWith, NotBeSubsetOf, NotHaveSameCount ,NotBeEquivalentTo - #610
• {New} Added BeCloseTo with TimeSpan - #621
• {New} Added missing/negations type assertions/selectors - #620
• {New} Added HaveCount variants for generic collections - #623
• {New} Added string.ContainAllOf and string.ContainAnyOf to verify a string against a collection of strings - #633
• {New} Added various examples to the docs on migrating from MSTest and tips for improved assertions - #614
• {New} Added more TimeSpan conversions - #650
• {New} Added TimeSpan extensions for micro and nano seconds - #669
• {New} Include the missing and superfluous item keys when comparing dictionaries - #723
• {New} Added an overload of BeEquivalentTo that takes a params array - #733
• {New} Added BeDecoratedWithOrInherit and NotBeDecoratedWithOrInherit for type assertions - #727
• {New} Fail when Should().[Not]Throw is used on async void action - #737
• {New} Add ThatAre[Not]DecoratedWithOrInherit - #748
• {New} Add support for unsigned types and sbyte - #750
• {Changed} Report all non-duplicate keys in collection.Should().OnlyHaveUniqueItems - #607
• {Changed} Relaxing the constructor for type selectors - #644
• {Changed} Constrained the generic parameter of ThatAreDecoratedWith to attributes - #642
• {Breaking} Unified ShouldBeEquivalentTo, ShouldAllBeEquivalentTo and collection.Should().BeEquivalentTo - #593
• {Breaking} Use the expectation instead of the subject to drive equivalency assertions in and moved them to the assertion classes - #593
• {Breaking} Removed support for Silverlight, WP for Silverlight and .NET 4.0 - #536
• {Breaking} Disable automatic conversion of property values in BeEquivalentTo and provided an opt-in API WithAutoConversion instead - #616
• {Breaking} Replaced the old thread-unsafe MonitorEvents API with a new Monitor extension method that will return a thread-safe monitoring scope that exposes methods like Should().Raise() and metadata such as OccurredEvents and MonitoredEvents - #625
• {Breaking} Changed Should[Not]Throw() to Should().[Not]Throw in order align all APIs - #648
• {Breaking} Changed the IValueFormatter contract to better support cyclic reference detection (#649)
• {Breaking} Align ExecutionTime[Of] with the rest of the v5.0.0 API by using Should() to assert - #653
• {Breaking} Removed WithInnerMessage as chaining WithInnerException with WithMessag gives the same result - #666
• {Breaking} Moved DateTime & Timespan construction to the 'Extensions' namespace - #675
• {Breaking} Change the extension methods for specifying milliseconds and nanoseconds to plural names - #703
• {Breaking} Assume types that override Equals to have value semantics and added ComparingByValue and ComparingByMembers - #740
• {Breaking} Renamed ISubjectInfo to IMemberInfo to better reflect its purpose - #747
• {Fix} Added proper formatting of Task and Task<T> - #651
• {Fix} Chaining Where on WithInnerExceptionExactly should work on the correct type - #656
• {Fix} BeDataContractSerializable didn't allow customizing the comparison - #667
• {Fix} Improved formatting for more precise DateTime, DateTimeOffset, and TimeSpans - #669
• {Fix} When comparing two Types who both happens to be null, NotBe() and Be() should still work as expected - #672
• {Fix} Include generic type in failure message - #691
• {Fix} Improved DateTime formatting for near-zero values - #695
• {Fix} Ignore double braces in failure messages - #715
• {Fix} Better messages when comparing empty collections - #719
• {Fix} Several performance improvements - #725
• {Fix} The equivalency report contained an empty line if no conversion was specified.
• {Fix} Unwrapping of TargetInvocationExceptions to improve the failure messages in equivalency assertions
• {Fix} Nested dictionary items didn't use the right expectation type - #746
• {Fix} Fail fast ReferenceEquals on NotEqual - #606