Release Notes

Packages are available on NuGet: protobuf-net, or it can be built from source

Roadmap

gRPC: see protobuf-net.Grpc
2.4.*: critical maintenance only (no feature work planned)
3.0: new custom serializer API (message+scalar); "pipelines" support; split core and reflection code-bases into separate libs
3.1: adds model depth validation, which may impact some models; see TypeModel.MaxDepth
future: Any support; custom list API support; support for [ReadOnly]Memory<T>, ReadOnlySequence<T>, IMemoryOwner<T>
future: protogen support for emitting pre-coded custom serializers
future: build-time tooling from code-first (aka "generators")

unreleased

support of deserializing ISet<T> and IReadOnlySet<T> (ladeak)

3.2.30

support DateOnly and TimeOnly (#1100 by @mgravell, fixes #977)
support Roslyn [DefaultValue] analyzer (#1040 by @deaglegross)

3.2.26

support IncludeInOutput on .proto additional files, to exclude from code-gen (#1032, #1046, #1047, #1062 by @kmosegaard and @dxdjgl)
support Uri in schema-generation as string (#1072 by @Matti-Koopa)

3.2.16

implement [NullWrappedCollection], usage as here (#1044)
support nint (IntPtr) and nuint (UIntPtr) with layout per long/ulong (#1043; fixes #1042, fixes grpc 282)

3.2.12

fix bug with default values not including literal suffixes (#1037)
fix SDKs used by BuildTools[.Legacy]
expose IncludeInOutput for files generated by BuildTools (#1030)

3.2.8

add support for deserializing into uninitialized IReadOnlyDictionary<TKey, TValue> (#1022 by ladeak)
fix missing namespace in [CompatibilityLevel] in code-gen (#1026)

3.2.0

implement [NullWrappedValue] (compile-time annotation for ValueMember.SupportNull, see 3.1.26)
add [NullWrappedValue] support in schema tools in both directions (#1001 by DeagleGross)
allow nullable primitives for optional values (#856 by dxdjgl, #855, #1016)
update dependencies
drop netcoreapp3.1 (still supported indirectly via netstandard2.1)
(build) switch to central package management

3.1.33

fix issue with comment-parsing in .proto schemas (#1010 / #1011)

3.1.31

support Memory<byte>, ReadOnlyMemory<byte> and ArraySegment<byte> as bytes payloads
add reader/writer API for Span<byte>/ReadOnlySpan<byte>
add support for full assembly metadata (bring forward #998 by mihaicodrean)
update protoc and Google reference proto files

3.1.26

reinstate ValueMember.SupportNull (from v2) for handling null values in lists

3.1.25

fix issue with non-supported features in tuple-types (#964)
add MessageType and EnumType on FieldDescriptorProto (#971)
expose fully qualified name for DescriptorProto and EnumDescriptorProto (#974)

3.1.22

fix schema parsing bug with semicolon-delimited options (#833)
fix schema parsing bug with escape characters in custom options (#931 / #933)
fix ProtoSyntax type-forwarding (#953)
update TFMs (#946)

3.1.17

add .NET 6 TFM for protogen (#928)
fix protobuf-net.BuildTools usage with duplicate filenames (#925)
fix protobuf-net.BuildTools issue with gRPC/WCF detection not working correctly

3.1.4

allow OverwriteList to work with properties declared as IEnumerable<T> (as a special-case) even if the existing value is a non-null, non-clearable collection

3.1.0

enforce maximum model depth (TypeModel.MaxDepth) during serialize and deserialize

3.0.131

support unknwon/extension fields on models that involve inheritance (via either Extensible or ITypedExtensible)
detect Google.Protobuf types and provide guidance (#722)
don't throw if EnumPassthru is explicitly set to true (#881) from code compiled against v2
fix #479 (also backported as 2.4.7)

3.0.62

add .NET 5 TFM and support for related features such as record-types
split protobuf-net.ServiceModel into a separate package to reduce the dependency tree for most users
fix .proto schema generation when an enum name is overridden
attempt to declare dynamically-accessed members for linker compatibility
fix init-only fields in IL-generation

3.0.52

add new protobuf-net.NodaTime package that adds direct support for NodaTime primitives (note: this may be relocated to a NodaTime library)
fix #700 - new APIs to allow surrogates to be defined externally, and to be implemented over primitive backing types
fix #703 - new options on MSBuild targets (via Konstantin Sharon)
fix #693 - new IgnoreUnknownSubTypes API on [ProtoContract(...)] and MetaType; serializes the types it does understand, and silently ignores the unknown sub-types
fix #695 - JIT error when serialization callbacks declared at types other than the inheritance root
fix #713 - work correctly with arrays (etc) of nullable enum types
fix #697 - improve error reporting for invalid end-group markers
fix #668 - additional non-generic APIs
fix problem with protogen website not allowing imports

3.0.24

fix bug in SchemaGenerationOptions (inverted input/output)

3.0.18

add new SchemaGenerationOptions API for schema generation; this allows service generation
tweaks to reflection services for gRPC (#617 via mholo65)

3.0.13

add support for deserializing directly from ReadOnlySpan<byte>
allow using open generic surrogates (#446 via ocoanet)
add netcoreapp3.1 target (#670 via iamcarbon)
add new protobuf-net.AspNetCore package with input/output formatter support

3.0.2

reworked fix from 3.0.1 (same behavior, different implementation)

3.0.1

fix bug with pre-measured objects and non-root <T> (gRPC #100)

3.0

first deploy of v3; everything as below
additional release notes

v3.0.0-alpha

breaking change if you are using new ProtoReader(...) - you must now use ProtoReader.Create(...)
breaking change by necessity, ProtoBuf.Serializer+TypeResolver has moved to ProtoBuf.Serializer; this is a rarely used API, but comsumers will need to be recompiled against the new type
breaking change - mapped enum values are no longer supported; all enums are treated as pass-thru, in line with "proto3" semantics
breaking change - dynamic typing (i.e. storing the Type metadata) and reference-tracking (AsReference, AsReferenceDefault, DynamicType) are not implemented/supported; this is partly due to doubts over whether the features are adviseable, and partly over confidence in testing all the scenarios (it takes time; that time hasn't get happened); feedback is invited
breaking change - non-generic list-like APIs like IList or ICollection are no longer supported; there is a new API for processing custom collection types
new state-based reader/writer API (works with streams, buffers, etc)
entire new custom serializer API
new CreateForAssembly(...) API (various overloads) for working with precompiled (at runtime) type models (faster than RuntimeTypeModel, but less flexible)

Some features are currently incomplete; this may restrict usage for some scenarios:

serialization callbacks on inheritance models are currently only supported at the root type; workaround: virtual / override
tuple-based types and types with surrogates cannot currently be used in inheritance chains - mostly because I need to figure out what that even means
null-item retention in lists/arrays is not currently implemented
custom default types for collection initializers are not yet implemented; a simple workaround is to initialize the collection in the type

There are some additional changes that are technically breaks, but which are simply bizarre things that probably never should have been allowed; these changes should not impact most people!

it is no longer valid to attempt to configure object
it is no longer valid to define an inheritance involving value-types
undeclared inheritance base-types are no longer supported; meaning: if you serialize a Foo : FooBase as a FooBase, but only tell the serializer about Foo (never mentioning FooBase), it will fail
all APIs that take int key referring to Type are deprecated; user code should not be directly using these APIs, so no impact is expected
the TypeModel API surface (for implementing custom models) has changed; user code should not be directly using these APIs, so no impact is expected
the default .proto syntax has been changed from Proto2 to Proto3; if this is a problem, either specify it explicitly, or there is a global option for the default syntax

Other changes:

in line with the Google implementation, the serializer now optimally chooses when to use "packed" encoding, rather than taking the user too literally
empty lists/arrays are no longer serialized (as empty payloads) when "packed" (they aren't serialized when not "packed", so this improves consistency)
as a consequence of the above, the "setter" may not be invoked (to an empty array) when previously it might have been; this again is consistent with how non-"packed" works
common stacks (Stack<T>, ConcurrentStack<T>) now preserve order correctly

2.4.8

add support for full assembly metadata (#998 by mihaicodrean)

2.4.7

2.4.6

apply #603 to 2.4 branch
apply #611 to 2.4 branch

2.4.5

Move TypeModel.Create (#609)
add ApplyFieldOffset API (#608)

2.4.4

mark DiscriminatedUnion* types as [Serializable]

2.4.2 / 2.4.3

add IProtoInput<T> / IProtoOutput<T> APIs for discovering input/output capabilities (this is to allow testing for 3.0 features)

2.4.1

fixes for .NET Core 3, thanks @szehetner
(this build deliberately does not update package dependencies, to reduce impact)

v2.4.0

fix #442 - switched to 2.4.0 due to new versioning implementation breaking the assembly version; oops

v2.3.17

(#430/#431) - ensure build output from protobuf-net.MSBuild makes it into build output; add error codes
#429 - use $IntermediateOutputPath correctly from build tools

v2.3.16

new MSBuild .proto tools added (huge thanks go to Mark Pflug here)
fix error where extension GetValues might only report the last item
switch to git-based versioning implementation; versioning now unified over all tools
extensions codegen (C#): add Get* and Add* implementations for repeated; add Set* implementations for regular
update protoc to 3.6.1
give advance warning of possible removal of ProtoReader/ProtoWriter constructors
codegen (C#): implement "listset" option to control whether lists/maps get set accessors
GetProto<T> now emits oneof-style .proto syntax for inheritance

protobuf-net v2.3.15

merge #412/fix #408 - ReadObject/WriteObject failed on value types
merge #421 - support IReadOnlyCollection members
merge #424 - make WCF configuration features available on TFMs that support them
merge #396 - remove unnecessary #if defs

protogen v1.0.10

fix error in generated C# when using enums in discriminated unions (#423)

protobuf-net v2.3.14

add UAP TFM

protogen v1.0.9

fix #406 - relative and wildcard paths (*.proto etc) failed on netcoreapp2.1, impacting the "global tool"

protobuf-net v2.3.13

IMPORTANT fix #403 - key cache was incorrect in some cases involving multi-level inheritance; update from 2.3.8 or above is highly recommended

protobuf-net v2.3.12

fix #402 - zero decimal with non-trivial sign/scale should round-trip correctly
fix additional scenarios for #401

protobuf-net v2.3.11

fix #401 - error introduced in the new key cache from v2.3.8

protobuf-net v2.3.10

fix #388 - stability when DynamicMethod is not available (UWP, iOS, etc)

protogen v1.0.8

move default .proto imports (from v1.0.7) to embedded resources that work for all consumers

protogen v1.0.7

ship default google and protobuf-net imports with the "global tool" install

protobuf-net v2.3.9

fix behaviour of DiscriminatedUnion* for None enum case

protogen v1.0.6

add #393 - optional ability to emit enums for oneof similar to Google's C# generator
extend C# support down to 2.0 and up to 7.1, and VB support down to VB 9
add website support for additional options (as above)

protobuf-net v2.3.8

speculative fix for iOS issues (#381)
add discriminator accessor to discriminated union types, for protogen v1.0.6
improve performance of ProtoWriter.DemandSpace (#378 from szehetner)
protogen - better support for wildcard paths (#390 from RansomVO)
fix #313 immutable arrays (#346 from BryantL)
improve LOH behaviour (#307 from mintsoft)
allow model precompilation for unknown types (#326 from daef)
improve type-key lookup performance (#310 from alex-sherman)

protogen v1.0.5

allow default package name using #FILE# and #DIR# tokens
more fixes for VB.NET idioms

protogen v1.0.4

fixes for VB.NET code-gen (especially: overflow in default values)
add wildcard+recursive generation modes for all languages
fix resolution of rooted types in imports without a package

protogen v1.0.3

VB.NET code-gen support added (from: alpha2)
packaging updates for "global tools" (from: alpha1)

protogen v1.0.2

packaging updates (no code changes)

protogen v1.0.1

unknown fields (IExtensible) now preserved by default, in line with Google's v3.5.0 release

protobuf-net v2.3.7

add .NET Standard 1.0 "profile 259" support - contributed by Lorick Russow

v2.3.6

add .NET Standard 2.0 build target

v2.3.5

add codegen support for C# 3.0; C# 6.0 is still the default, but can be overridden via CLI or .proto options; see #343
updated Google "protoc" tooling on the web-site
better exception messages when inheritance problems are detected; #186 via TrexinanF14
add switch to allow the string cache code to be disabled; #333 via solyutor

v2.3.4

fix #341 - dictionaries with nullable types

v2.3.3

fix protogen bug with [DefaultValue] for enums not including the fully qualified name when required
fix pathological memory usage bug with large buffers (int-overflow); many thanks to Mikhail Brinchuk

v2.3.2

fix bug with IgnoreListHandling not being respected for custom dictionary-like types (with "map" taking precedence)

v2.3.1

fix bug with optional being emitted for sub-types in proto3 schemas (#280)
add setter to ValueMember.Name - in particular allows runtime enum name configuration (#281)
fix bug with implicit map when TKey is an enum type (#289)
fix build config (optimized build)

v2.3.0

include better information when rejecting jagged arrays / nested lists (SO 45062514)

v2.3.0-gamma

fix issue with "map" detection of complex dictionaries-of-arrays incorrectly trying to configure a MetaType for the array type

v2.3.0-beta

fix issue with unwanted static constructors being detected (#276)
explicitly prevent MetaType instances for arrays

v2.3.0-alpha

further reading
proto2/proto3 DSL processing tools to make a resurgance; preview is available here
proto3 schema generation
full support for map<,>, Timestamp, Duration
dictionaries are now "maps" by default - duplicated keys replace values rather than causing exceptions
support for one-of
enums are now "pass thru" whenever possible - unknown values will not normally cause exceptions (this indirectly fixes #260, but proto3 semantics was the motivation)
various bug-fixes
fix bug in schema output forn enums withut a zero value (#224)
fix bug in runtime handling of immutable collections (#264)
fix issue with serialization context being list (#268)
fix issue with type error message when type is generic (#267)
net20 / net35 targets reinstated for NuGet build (#262)
fix for Uri handling (#162 / #261)
fix: Type members should work with GetProto<T> (as string)

v2.2.1

critical bug fix #256 - length-based readers are failing; if you are using 2.2.0, please update as soon as possible (this bug was introduced in 2.2.0)
fix #241 - check all callback parameters (signature validation)
removed [Obsolete] markers left in place during 64-bit updates
release string interner earlier (keeps a possibly-large array reachable)
various documentation fixes (#184, #189, #216)

v2.2.0

enable 64-bit processing (2GiB+ file sizes) within constraints that no single sub-graph can exceed 2GiB; this is assisted by...
new IsGroup property on [ProtoContract(...)] that indicates that a type should always be treated as a group (rather than having to specify "group" per-member); groups do not require length-prefix or buffering, so are trivially usable in huge files
support get-only automatically-implemented properties (#188)
support ValueTuple<...>
fix bug with cyclic types resolving as lists (#167)
optimized encoding of packed fixed-length primitives (in particular, arrays)

v2.1.0

add support for custom static methods equivalent to static conversion operators, via [ProtoConverter]
GetSchema: do not emit default values for non-optional members (#75)
.NET Standard support
protogen: allow use of native protoc; additional proto-path support (#119)
protogen: fix name for getters and default value (#2)
fix timeout issue on portable frameworks (#114)
DateTime serialization can include DateTimeKind
fix Uri serialization on PCLs (#98)
documentation typos and tweaks (#99, #112)
tupe serializer: fix issues with case sensitivity / i18n (#104)
fix bug with returning empty byte arrays (#111)
additional convenience Deserilize overload (#12)
support serialization-context-aware callback methods

v2.0.0.668

(baseline)

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