se-launcher/PluginLoader/Data/WorkshopPlugin.cs

using ProtoBuf;
using VRage;

namespace PluginLoader.Data;

[ProtoContract]
public class WorkshopPlugin : SteamPlugin
{
    private string assembly;

    protected WorkshopPlugin()
    {
    }

    public override string Source => MyTexts.GetString(MyCommonTexts.Workshop);
    protected override string HashFile => "hash.txt";

    protected override void CheckForUpdates()
    {
        assembly = Path.Combine(root, Path.GetFileNameWithoutExtension(sourceFile) + ".dll");

        var found = false;
        foreach (var dll in Directory.EnumerateFiles(root, "*.dll"))
            if (dll == assembly)
                found = true;
            else
                File.Delete(dll);
        if (!found)
            Status = PluginStatus.PendingUpdate;
        else
            base.CheckForUpdates();
    }

    protected override void ApplyUpdate()
    {
        File.Copy(sourceFile, assembly, true);
    }

    protected override string GetAssemblyFile()
    {
        return assembly;
    }
}