ET9_WebGL_Base/CSharp/Game/Component/ConfigAttribute.cs

using System;

namespace Component
{
    [AttributeUsage(AttributeTargets.Class)]
    public class ConfigAttribute: Attribute
    {
        public string RelativeDirectory { get; set; }

        public ConfigAttribute()
        {
            this.RelativeDirectory = @"..\Config";
        }
    }
}