jl0pd

type Color(r, g, b) = class end

module DSL =
    type IView = interface end
    type ViewBase() = interface IView
    type VStackView(items: IView[]) = inherit ViewBase()
    type ButtonView() = inherit ViewBase()

    type ViewBase with

jl0pd

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <PropertyGroup>
    <WarningsAsErrorsRange>
      $(WarningsAsErrorsRange);

jl0pd

using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace SumTest
{
    class Program