protobuf-net 3.4.29

protobuf-net

A contract-based serializer for .NET that reads and writes Google's "protocol buffers" wire format. The API follows normal .NET patterns — broadly comparable to XmlSerializer or DataContractSerializer — so you annotate the types you already have:

[ProtoContract]
public class Person
{
    [ProtoMember(1)] public int Id { get; set; }
    [ProtoMember(2)] public string Name { get; set; }
}

using var file = File.Create("person.bin");
Serializer.Serialize(file, new Person { Id = 12345, Name = "Fred" });

Members are identified on the wire by number, not by name, so the numbers matter: pick them once and keep them stable. Everything the attributes do can also be configured at runtime, via RuntimeTypeModel.

Contract-first works too: generate C#/VB from a .proto schema at build time, from the command line with protobuf-net.Protogen, or in your browser at protobuf-net.dev.

Build tools — analyzers that check your contracts, and the generator that emits serializers at compile time so native AOT and trimming work — ship with this package by default; opt out with <ProtoBufDisableBuildTools>true</ProtoBufDisableBuildTools>.

More

Showing the top 20 packages that depend on protobuf-net.

Packages Downloads
prometheus-net
.NET client for prometheus.io
20
prometheus-net
.NET client for prometheus.io
21
prometheus-net
.NET client for prometheus.io
23
prometheus-net
.NET client for prometheus.io
24
prometheus-net
.NET client for prometheus.io
26
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
21
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
23
protobuf-net.Reflection
ProtoBuf DSL (proto2 / proto3) and desccriptor tools for protobuf-net
51
protobuf-net.Reflection
ProtoBuf DSL (proto2 / proto3) and descriptor tools for protobuf-net
45
protobuf-net.Reflection
ProtoBuf DSL (proto2 / proto3) and descriptor tools for protobuf-net
48
protobuf-net.Reflection
ProtoBuf DSL (proto2 / proto3) and descriptor tools for protobuf-net
50
protobuf-net.Reflection
ProtoBuf DSL (proto2 / proto3) and descriptor tools for protobuf-net
51
protobuf-net.Reflection
ProtoBuf DSL (proto2 / proto3) and descriptor tools for protobuf-net
54

https://github.com/protobuf-net/protobuf-net/releases

.NET Framework 4.6.2

.NET 8.0

.NET Standard 2.0

.NET Standard 2.1

Version Downloads Last updated
3.4.30 10 09/18/2026
3.4.29 10 09/15/2026
3.4.28 10 09/15/2026
3.4.21 13 08/31/2026
3.4.19 15 08/26/2026
3.4.14 14 08/22/2026
3.4.0 16 08/21/2026
3.3.21 20 08/18/2026
3.3.8 19 08/15/2026
3.3.0 19 08/15/2026
3.2.56 57 03/20/2026
3.2.55 56 03/20/2026
3.2.52 49 03/20/2026
3.2.46 46 03/20/2026
3.2.45 45 03/20/2026
3.2.30 49 03/20/2026
3.2.26 53 03/20/2026
3.2.16 48 03/20/2026
3.2.12 58 03/20/2026
3.2.8 54 03/20/2026
3.2.0 51 03/20/2026
3.1.33 44 03/20/2026
3.1.26 53 03/20/2026
3.1.25 52 03/20/2026
3.1.22 48 03/20/2026
3.1.17 54 03/20/2026
3.1.4 44 03/20/2026
3.1.0 56 03/20/2026
3.0.131 50 03/20/2026
3.0.101 62 03/20/2026
3.0.73 55 03/20/2026
3.0.72 53 03/20/2026
3.0.62 55 03/20/2026
3.0.52 54 03/20/2026
3.0.29 56 03/20/2026
3.0.27 53 03/20/2026
3.0.24 52 03/20/2026
3.0.21 55 03/20/2026
3.0.18 54 03/20/2026
3.0.13 55 03/20/2026
3.0.2 47 03/20/2026
3.0.0 54 03/20/2026
2.4.9 54 03/20/2026
2.4.8 57 03/20/2026
2.4.7 49 03/20/2026
2.4.6 56 03/20/2026
2.4.4 47 03/20/2026
2.4.1 58 03/20/2026
2.4.0 54 03/20/2026
2.3.17 32 03/20/2026
2.3.16 45 03/20/2026
2.3.15 56 03/20/2026
2.3.14 54 03/20/2026
2.3.14-alpha1 55 03/20/2026
2.3.13 51 03/20/2026
2.3.7 57 03/20/2026
2.3.6 49 03/20/2026
2.3.5 48 03/20/2026
2.3.4 50 03/20/2026
2.3.3 44 03/20/2026
2.3.2 54 03/20/2026
2.3.1 51 03/20/2026
2.3.0 53 03/20/2026
2.3.0-gamma 53 03/20/2026
2.2.1 51 03/20/2026
2.1.0 51 03/20/2026
2.1.0-alpha-5 49 03/20/2026
2.1.0-alpha-4 52 03/20/2026
2.1.0-alpha-3 54 03/20/2026
2.1.0-alpha-1 49 03/20/2026
2.0.0.668 55 03/20/2026
2.0.0.666 53 03/20/2026
2.0.0.664 55 03/20/2026
2.0.0.663 58 03/20/2026
2.0.0.640 45 03/20/2026
2.0.0.638 50 03/20/2026
2.0.0.621 51 03/20/2026
2.0.0.619 49 03/20/2026
2.0.0.614 58 03/20/2026
2.0.0.612 55 03/20/2026
2.0.0.611 50 03/20/2026
2.0.0.602 58 03/20/2026
2.0.0.601 48 03/20/2026
2.0.0.480 46 03/20/2026
1.0.0.280 43 03/20/2026