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9.1

Release 9.1 brings a set of rules that help users avoid performance pitfalls.

New Rules

• 7132 - [C#] New rule S6618: "string.Create" should be used instead of "FormattableString"
• 7131 - [C#, VB.NET] New rule S6617: "Contains" should be used instead of "Any" for simple equality checks
• 7129 - [C#, VB.NET] New rule S6613: "First" and "Last" properties of "LinkedList" should be used instead of the "First()" and "Last()" extension methods
• 7128 - [C#, VB.NET] New rule S6612: The lambda parameter should be used instead of capturing arguments in "ConcurrentDictionary" methods
• 7127 - [C#, VB.NET] New rule S6610: "StartsWith" and "EndsWith" overloads that take a "char" should be used instead of the ones that take a "string"
• 7126 - [C#, VB.NET] New rule S6609: "Min/Max" properties of "Set" types should be used instead of the "Enumerable" extension methods
• 7125 - [C#, VB.NET] New rule S6608: Indexing should be used instead of "Enumerable" methods on types implementing "IList"
• 7124 - [C#, VB.NET] New rule S6607: The collection should be filtered before sorting by using "Where" before "OrderBy"
• 7123 - [C#, VB.NET] New rule S6605: Collection-specific "Exists" method should be used instead of the "Any" extension
• 7122 - [C#, VB.NET] New rule S6603: The collection-specific "TrueForAll" method should be used instead of the "All" extension
• 7121 - [C#, VB.NET] New rule S6602: "Find" method should be used instead of the "FirstOrDefault" extension

Improvements

• 7197 - [VB.NET] Improve S2302 Message: Use NameOf for VB.NET
• 7133 - [C#] Extend S3260 to include file access modifier on types

Bug Fixes

• 7134 - [C#] Fix AD0001 in S138: NullReferenceException

False Negative

• 2528 - [C#] FPs and FNs in the Symbolic Execution rules when null coalescing is combined with arithmetic expressions because we do not support constraints on integers

9.0

Release 9.0 changes the target framework from net46 to netstandard2.0. Thus the minimal support version is .NET Framework 4.6.2 now.
Thanks to @​Corniel for fixing an FP in S2049.

Improvements

• 7095 - Update RSPEC before 9.0 release
• 6028 - Target netstandard2.0 instead of net46
• 4824 - [C#, VB.NET] SE: Update rule activation to be compatible with .editorconfig

False Positive

• 3400 - [C#] Fix S3900 FP: When parameter reassigned from a method
• 2591 - [C#] Fix S3900 FP: Re-assignment of parameters is ignored
• 6972 - [C#] Fix S3900 FP: Ignore parameters with assigned values
• 5729 - [C#] Fix S3900 FP: Recognize ArgumentNullException.ThrowIfNull()
• 6953 - [C#] Fix S2094 FP: Records which set the base record's properties in their initializer

8.56

Release 8.56 is here and it brings a whole lot of improvements. We implemented S3900 and S3655 for VB.NET and at the same time, we also got improvements to the C# versions of S3900, S3655, S2222, and S2259. Special kudos to @​Corniel who contributed new rule S5856 and several other enhancements.

New Rules

• 6797 - [VB.NET] New Rule S3900 for VB.NET: Arguments of public methods should be validated against Nothing
• 6795 - [VB.NET] New Rule S3655 for VB.NET: Empty nullable value should not be accessed
• 6691 - [C#, VB.NET] New Rule S5856: Regex literals should be valid by @​Corniel

Improvements (S3900, S3655, S2222, and S2259)

• 6794 - [C#] Improve S3655: Support C# 9 and C# 10 syntax

... (truncated)

• 48001c5 Update parent pom version (#7268)
• e523c60 Update RSPEC before 9.1 release (#7266)
• 9ded47c SE: Add BitOrOperation (#7232)
• 28f3de2 SE: CompoundAssignment learns NotNull (#7257)
• 6c05986 Fix S6612 FP: lambda parameter used inside NameOf() (#7255)
• f608ee4 SE: Learn NumberConstraint from range comparisons (#7242)
• 5ca6364 SE: Reset values on compound assignments (#7223)
• ae4c24a Update the expected csharp plugin file size range (#7248)
• 7c5ff36 Repo S101 FP: Lower case character after number (#7244)
• 030173b SE UTs: Replace ValidateTag with TagValue (#7236)
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