Potentially breaking changes

• C# 11 required keyword now recognized as required: Properties using the C# 11 required keyword (RequiredMemberAttribute / JsonRequiredAttribute) are now correctly treated as required in schema generation and code output. Previously these were incorrectly treated as optional (Required.Default). This changes generated code: such properties now get Required.Always, [Required] attribute, and the required modifier when UseRequiredKeyword is enabled. (#1908)
• Both JsonStringEnumMemberName and EnumMember attributes are now emitted for enum members when using System.Text.Json, for compatibility with NSwag's reflection-based URL parameter serialization. (#1905)
• $schema version preserved in ToJson() instead of forcing draft-04. If you relied on the output always being draft-04, this may affect you. (#1881)
• patternProperties validation now correctly applies to all matching properties, not just the first. (#1898)
• MinLength no longer incorrectly applied to DateTime, DateTimeOffset, DateOnly, TimeOnly properties. (#1900)

What's Changed

• Use NET 10 SDK and upgrade to NUKE 10 by @lahma in #1876
• Upgrade to NUKE 10.1.0 by @lahma in #1877
• Fix + in JSON reference paths being decoded as space by @Copilot in #1880
• Fix property named -1 generating invalid C# identifier instead of Minus1 by @Copilot in #1882
• Fix infinite loop in RenamePropertyWithSameNameAsClass when suffixed name is already taken by @Copilot in #1883
• Preserve original $schema version in ToJson() instead of forcing draft-04 by @Copilot in #1881
• docs: Clarify TypeScriptVersion accepts any decimal ≥ 4.3 by @Copilot in #1884
• Include root README.md in all NuGet packages by @Copilot in #1885
• Fix outdated JSON schema output example in README by @Copilot in #1887
• Add SPDX-License-Identifier to C# file headers by @Copilot in #1886
• Support JsonPropertyOrder attribute for schema property ordering by @Copilot in #1892
• Fix generated classes new line for annotations by @Copilot in #1893
• Support EnumDataType annotation in JSON schema generation by @Copilot in #1890
• Fix ExtensionData merge behavior and add enum support for JsonSchemaExtensionDataAttribute by @Copilot in #1888
• SampleJsonDataGenerator: generate GUID for uuid/guid format strings by @Copilot in #1895
• Fix SampleJsonDataGenerator overflow for long min/max values by @lahma in #1901
• Fix ObsoleteAttribute not applied to classes with a base class by @lahma in #1902
• Fix MinLength incorrectly added to DateTime and Date types by @lahma in #1900
• Fix patternProperties validation to apply to all properties by @lahma in #1898
• Support C#11 required keyword in schema generation by @lahma in #1908
• Emit both JsonStringEnumMemberName and EnumMember attributes by @lahma in #1905
• Fix IsStringEnumArray for nullable enum arrays by @lahma in #1904
• Fix Display(Name) not setting schema title on classes by @lahma in #1906
• Fix public fields excluded with STJ IncludeFields=true by @lahma in #1907
• Fix IPv4 format validator regex false positives by @lahma in #1909
• Update Namotion.Reflection package to version 3.5.0 by @RicoSuter in #1916

New Contributors

• @Copilot made their first contribution in #1880

Full Changelog: v11.5.2...v11.6.0