Could not load file or assembly 'System.Buffers, Version=4.0.2.0...'

The easiest way is to use Nuget package manager, downgrade system.buffers to any lower version, and then upgrade it to the latest again.

Could not load file or assembly 'System.Buffers, Version=4.0.2.0…'

Solution

1) use CMD(run as Administrator ) and type

 cd xxxx(xxxx\packages\System.Buffers.4.5.1\lib\netstandard2.0))

run

gacutil /i System.Buffers.dll

Then, when you finish it, please run update-package -reinstall under package manager console to reinstall the package.

2) you can try to change Version=4.0.2.0 to Version=4.0.3.0 in csproj file.

Besides, there is a similar issue you can refer to.

In my case, I had to add the assembly reference in the web.config that was already published in the Azure App Service, inside the <configuration></configuration> tag:

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <dependentAssembly>
      <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
    </dependentAssembly>
  </assemblyBinding>
</runtime>