System.Runtime.CompilerServices.Unsafe

[amastrobera]

hello,

I am using Visual Studio 2019, Windows 10, .Net Framework 4.8, in C#.

I have my proto model.proto that compiles into Model.pb.cs, and I use it in my program.

The program in question simply fills the data model and saves it to file.

using PMOD = MyProtobuf.Model;

using NLog;
using NetMQ;
using NetMQ.Sockets;
using System;
using System.Text;
using System.IO;

var req = PMOD.MyDataModel();
// fill up req with all data ...
using (var file_output = File.Create("path/to/save/PB/file/into")) {
   using (var stream_output = new Google.Protobuf.CodedOutputStream(file_output)) {
      req.WriteTo(stream_output); <---- this one gives errors
   }
}

the relative .csproj is something like that

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net48</TargetFramework>
    <PlatformTarget>x64</PlatformTarget>
    <OutputType>Library</OutputType>
  </PropertyGroup>

  <ItemGroup>
      <Protobuf Include="../../protobuf/model.proto" Link="model.proto" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="coverlet.msbuild" Version="3.0.3">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
    <PackageReference Include="Google.Protobuf" Version="3.15.6" />
    <PackageReference Include="Grpc" Version="2.36.4" />
    <PackageReference Include="MathNet.Numerics" Version="4.15.0" />
    <PackageReference Include="MathNet.Spatial" Version="0.6.0" />
    <PackageReference Include="NetMQ" Version="4.0.1.6" />
    <PackageReference Include="NLog" Version="4.7.9" />
    <PackageReference Include="System.Text.Json" Version="5.0.2" />
  </ItemGroup>

  etc etc ... with files to compile

this is the error

Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

It looks like Google.Protobuf needs System.Runtime.CompilerServices.Unsafe >= 4.5, and System.Text.Json needs >= 5.0. So I added it from NuGet :

<PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />

--> I still get the same error.

later I checked this post and tried to apply the same solution doing either gacutil /i System.Runtime.CompilerServices.Unsafe.dll or saving the config into the app.config (that wasn't needed before).

--> I still get the same error.

What should I do ?

[naiksujit]

Apparently it is due to incorrect versioning done at System.Runtime.CompilerServices.Unsafe.

The System.Runtime.CompilerServices.Unsafe.dll from nuget package for 4.5.2 shows version 4:0:4:1 in manifest.

And when Google.protobuff compiles with System.Runtime.CompilerServices.Unsafe 4.5.2 it is reflected in its manifest.

.assembly extern System.Runtime.CompilerServices.Unsafe { .publickeytoken = (B0 3F 5F 7F 11 D5 0A 3A ) // .?_....: .ver 4:0:4:1 }

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