Environment

• Pythonnet version: 3.0.3
• Python version: 3.9
• Operating System: Windows 11
• .NET Runtime: .net8 (release version 16/11/23)

Details

• When shutting down the the PythonEngine via a Dispose method on the impermentation class, the error occurs at the PythonEngine.Shutdown(); method and throws the error System.NotSupportedException: BinaryFormatter serialization and deserialization are disabled within this application (see trace below). The same code worked in .net7 without any issues, the error message leads to this description

• https://learn.microsoft.com/en-us/dotnet/standard/serialization/binaryformatter-security-guide

• Proir to the Shutdown error the pythonnet works correctly and calls python functions and returns the expected results

• The resolution is to add true to the .csproj file

• <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
   </PropertyGroup>
  

  TODO

• _logger.Log is to to trace the point of failure

• _logger.Log(LogLevel.Error, "Shutting down Python engine"); runs

• it crashes at the PythonEngine.Shutdown(); method

• _logger.Log(LogLevel.Error, "Python engine shut down"); does not run

  private void Dispose(bool disposing)
  {
  _logger.Log(LogLevel.Error, "Dispose");
  if (_disposed) return;
  if (disposing)
  {
  _logger.Log(LogLevel.Error, "Shutting down Python engine");
  PythonEngine.Shutdown();
  _logger.Log(LogLevel.Error, "Python engine shut down");
  }
  _disposed = true;
  }

• System.NotSupportedException: BinaryFormatter serialization and deserialization are disabled within this application. See https://aka.ms/binaryformatt...

System.NotSupportedException
BinaryFormatter serialization and deserialization are disabled within this application. See https://aka.ms/binaryformatter for more information.
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph)
at Python.Runtime.RuntimeData.Stash()
at Python.Runtime.Runtime.Shutdown()
at Python.Runtime.PythonEngine.Shutdown()
at EcgAi.Training.Infrastructure.Python.PythonEnvironment.Dispose(Boolean disposing) in C:\Data\Rider\EcgAi.Training\Src\EcgAi.Training.Infrastructure.Python\PythonEnvironment.cs:line 113
at EcgAi.Training.Infrastructure.Python.PythonEnvironment.Dispose() in xxxxxxxxxxxxxxxxxxxxxxxxx