Files survive when your handler doesn't

Handler.cs

public class Handler
{
    private Guid _variableGuid;

    public Handler()
    {
        _variableGuid = Guid.NewGuid();
        Console.WriteLine($"Constructor: {_variableGuid}");
    }

    public void EntryPoint()
    {
        Console.WriteLine($"EntryPoint: {_variableGuid}");

        const string file = "/tmp/zac";

        // Execution #1
        if (!File.Exists(file))
        {
            File.WriteAllText(file, _variableGuid.ToString());
            Console.WriteLine($"Created file.");
            return;
        }

        var fileGuid = Guid.Parse(File.ReadAllText(file));
        Console.WriteLine($"File: {fileGuid}");

        // Execution #2
        if (fileGuid == _variableGuid)
        {
            Console.WriteLine("GUIDs are the same.");
            Thread.Sleep(3000);
            return;
        }

        // Execution #3
        Console.WriteLine("GUIDs are NOT the same.");
    }
}