encompass-cs/encompass-cs/Attributes/Adds.cs

using System;
using System.Collections.Generic;

namespace Encompass
{
    [AttributeUsage(AttributeTargets.Class)]
    public class Adds : Attribute
    {
        public readonly HashSet<Type> addTypes;

        public Adds(params Type[] addTypes)
        {
            this.addTypes = new HashSet<Type>(addTypes);
        }
    }
}