protobuf-net 3.4.14

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>.

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

Packages Downloads
BeetleX.Redis
A high-performance async/non-blocking redis client components for dotnet core,default support json and protobuf data format
 32
BeetleX.Redis
A high-performance async/non-blocking redis client components for dotnet core,default support json and protobuf data format
 34
BeetleX.Redis
A high-performance async/non-blocking redis client components for dotnet core,default support json and protobuf data format
 36
BeetleX.Redis
A high-performance async/non-blocking redis client components for dotnet core,default support json and protobuf data format
 59
prometheus-net
.NET client for prometheus.io
 32
prometheus-net
.NET client for prometheus.io
 33
prometheus-net
.NET client for prometheus.io
 34
prometheus-net
.NET client for prometheus.io
 35
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
 32
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
 33
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
 34
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
 35
prometheus-net
.NET metrics exporter for the Prometheus monitoring and alerting system
 37

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
3.4.14 1 08/22/2026
3.4.0 0 08/20/2026
3.3.21 0 08/17/2026
3.3.8 1 08/21/2026
3.3.0 0 08/11/2026
3.3.0-g6785ecbb35 24 07/19/2025
3.2.56 19 08/11/2025
3.2.55 25 08/10/2025
3.2.52 34 04/26/2025
3.2.46 37 01/31/2025
3.2.45 26 01/18/2025
3.2.30 27 12/16/2023
3.2.26 35 11/26/2023
3.2.16 26 12/21/2023
3.2.12 26 12/19/2023
3.2.8 28 03/01/2024
3.2.0 31 12/03/2023
3.1.33 24 03/01/2024
3.1.26 29 01/12/2024
3.1.25 27 12/21/2023
3.1.22 33 12/27/2023
3.1.17 29 01/02/2024
3.1.4 25 12/02/2023
3.1.0 32 12/01/2023
3.0.131 26 11/03/2023
3.0.101 52 08/18/2023
3.0.73 26 03/01/2024
3.0.72 26 01/06/2024
3.0.62 28 03/01/2024
3.0.52 33 03/01/2024
3.0.29 31 12/02/2023
3.0.27 32 01/07/2024
3.0.24 30 12/11/2023
3.0.21 28 03/02/2024
3.0.18 23 12/19/2023
3.0.13 32 01/13/2024
3.0.2 25 12/28/2023
3.0.0 25 11/03/2023
2.4.9 21 03/07/2025
2.4.8 28 12/03/2023
2.4.7 23 12/04/2023
2.4.6 27 01/03/2024
2.4.4 33 12/02/2023
2.4.1 24 12/04/2023
2.4.0 29 01/03/2024
2.3.17 32 11/03/2023
2.3.16 21 11/04/2023
2.3.15 30 03/02/2024
2.3.14 31 01/12/2024
2.3.14-alpha1 27 03/01/2024
2.3.13 41 03/01/2024
2.3.7 33 12/19/2023
2.3.6 28 11/04/2023
2.3.5 27 12/03/2023
2.3.4 24 12/05/2023
2.3.3 22 03/26/2024
2.3.2 22 12/17/2023
2.3.1 21 12/02/2023
2.3.0 24 12/01/2023
2.3.0-gamma 25 12/01/2023
2.2.1 29 03/01/2024
2.1.0 32 03/25/2024
2.1.0-alpha-5 27 03/12/2024
2.1.0-alpha-4 24 03/12/2024
2.1.0-alpha-3 28 03/05/2024
2.1.0-alpha-1 26 03/04/2024
2.0.0.668 32 11/30/2023
2.0.0.666 26 12/02/2023
2.0.0.664 30 12/03/2023
2.0.0.663 28 11/29/2023
2.0.0.640 28 12/04/2023
2.0.0.638 32 01/15/2024
2.0.0.621 26 12/19/2023
2.0.0.619 36 12/03/2023
2.0.0.614 25 12/04/2023
2.0.0.612 27 12/04/2023
2.0.0.611 34 12/03/2023
2.0.0.602 30 12/03/2023
2.0.0.601 27 12/03/2023
2.0.0.480 29 12/19/2023
1.0.0.280 26 03/02/2024