IsObsoleteAttribute
This attribute indicates the node is obsolete
            
using System;
using System.Reflection;
namespace Autodesk.DesignScript.Runtime
{
    [AttributeUsage(AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property)]
    public class IsObsoleteAttribute : Attribute
    {
        public string Message { get; set; }
        public IsObsoleteAttribute()
        {
            Message = string.Empty;
        }
        public IsObsoleteAttribute(string message)
        {
            Message = message;
        }
        public IsObsoleteAttribute(string descriptionResourceID, Type resourceType)
        {
            LookupResourceByID(descriptionResourceID, resourceType);
        }
        public IsObsoleteAttribute(string descriptionResourceID, string typeName)
        {
            Type type = Type.GetType(typeName);
            LookupResourceByID(descriptionResourceID, type);
        }
        private void LookupResourceByID(string descriptionResourceID, Type resourceType)
        {
            if (resourceType == (Type)null)
                throw new ArgumentNullException("resourceType");
            PropertyInfo property = resourceType.GetProperty(descriptionResourceID, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
            if (property != (PropertyInfo)null && property.PropertyType == typeof(string))
                Message = (property.GetValue(null, null) as string);
            else
                Message = descriptionResourceID;
        }
    }
}