c#
ModAssemblyLoadContext assemblyLoadCtx = new ModAssemblyLoadContext();
assemblyLoadCtx.LoadFromAssemblyPath(dllAbsPath);
assemblyLoadCtx.Resolving += ModAssemblyLoadContext.ResolveDependencies;
assembly = ModAssemblyLoadContext.GetMainAssembly(assemblyLoadCtx);

c#
ModAssemblyLoadContext assemblyLoadCtx = new ModAssemblyLoadContext();
assemblyLoadCtx.LoadFromAssemblyPath(dllAbsPath);
assemblyLoadCtx.Resolving += ModAssemblyLoadContext.ResolveDependencies;
assembly = ModAssemblyLoadContext.GetMainAssembly(assemblyLoadCtx);

c#
class ModAssemblyLoadContext : AssemblyLoadContext {
    public ModAssemblyLoadContext()
    : base("ModAssemblyLoadContext") { }

    /// <summary>
    /// Returns the main assembly.
    /// </summary>
    public static Assembly GetMainAssembly(AssemblyLoadContext ctx) {
        Assembly? mainAssembly = ctx.Assemblies.FirstOrDefault();
        if(mainAssembly == null) {
            throw new NullReferenceException("Failed to extract the main assembly");
        }

        return mainAssembly;
    }

    /// <summary>
    /// Resolves dependencies for a given assembly.
    /// </summary>
    public static Assembly? ResolveDependencies(AssemblyLoadContext ctx, AssemblyName depAssemblyName) {
        string depAssemblyFilename = depAssemblyName.Name + ".dll";

        Assembly mainAssembly = GetMainAssembly(ctx);
        string mainAssemblyLoadedFrom = Path.GetDirectoryName(mainAssembly.Location);

        string depAssemblyPathAlongMainAssembly = Path.Combine(mainAssemblyLoadedFrom, depAssemblyFilename);
        if(File.Exists(depAssemblyPathAlongMainAssembly)) {
            return Assembly.LoadFrom(depAssemblyPathAlongMainAssembly);
        }

        return null;
    }
}

c#
class ModAssemblyLoadContext : AssemblyLoadContext {
    public ModAssemblyLoadContext()
    : base("ModAssemblyLoadContext") { }

    /// <summary>
    /// Returns the main assembly.
    /// </summary>
    public static Assembly GetMainAssembly(AssemblyLoadContext ctx) {
        Assembly? mainAssembly = ctx.Assemblies.FirstOrDefault();
        if(mainAssembly == null) {
            throw new NullReferenceException("Failed to extract the main assembly");
        }

        return mainAssembly;
    }

    /// <summary>
    /// Resolves dependencies for a given assembly.
    /// </summary>
    public static Assembly? ResolveDependencies(AssemblyLoadContext ctx, AssemblyName depAssemblyName) {
        string depAssemblyFilename = depAssemblyName.Name + ".dll";

        Assembly mainAssembly = GetMainAssembly(ctx);
        string mainAssemblyLoadedFrom = Path.GetDirectoryName(mainAssembly.Location);

        string depAssemblyPathAlongMainAssembly = Path.Combine(mainAssemblyLoadedFrom, depAssemblyFilename);
        if(File.Exists(depAssemblyPathAlongMainAssembly)) {
            return Assembly.LoadFrom(depAssemblyPathAlongMainAssembly);
        }

        return null;
    }
}