SwitchAttribute.cs

using System.Collections;
using System.Reflection;

namespace System.Diagnostics
{
    [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Event)]
    public sealed class SwitchAttribute : Attribute
    {
        private Type type;

        private string name;

        private string description;

        public string SwitchName
        {
            get
            {
                return name;
            }
            set
            {
                if (value == null)
                {
                    throw new ArgumentNullException("value");
                }
                if (value.Length == 0)
                {
                    throw new ArgumentException(SR.GetString("InvalidNullEmptyArgument", "value"), "value");
                }
                name = value;
            }
        }

        public Type SwitchType
        {
            get
            {
                return type;
            }
            set
            {
                if (value == null)
                {
                    throw new ArgumentNullException("value");
                }
                type = value;
            }
        }

        public string SwitchDescription
        {
            get
            {
                return description;
            }
            set
            {
                description = value;
            }
        }

        public SwitchAttribute(string switchName, Type switchType)
        {
            SwitchName = switchName;
            SwitchType = switchType;
        }

        public static SwitchAttribute[] GetAll(Assembly assembly)
        {
            if (assembly == null)
            {
                throw new ArgumentNullException("assembly");
            }
            ArrayList arrayList = new ArrayList();
            object[] customAttributes = assembly.GetCustomAttributes(typeof(SwitchAttribute), inherit: false);
            arrayList.AddRange(customAttributes);
            Type[] types = assembly.GetTypes();
            for (int i = 0; i < types.Length; i++)
            {
                GetAllRecursive(types[i], arrayList);
            }
            SwitchAttribute[] array = new SwitchAttribute[arrayList.Count];
            arrayList.CopyTo(array, 0);
            return array;
        }

        private static void GetAllRecursive(Type type, ArrayList switchAttribs)
        {
            GetAllRecursive((MemberInfo)type, switchAttribs);
            MemberInfo[] members = type.GetMembers(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
            for (int i = 0; i < members.Length; i++)
            {
                if (!(members[i] is Type))
                {
                    GetAllRecursive(members[i], switchAttribs);
                }
            }
        }

        private static void GetAllRecursive(MemberInfo member, ArrayList switchAttribs)
        {
            object[] customAttributes = member.GetCustomAttributes(typeof(SwitchAttribute), inherit: false);
            switchAttribs.AddRange(customAttributes);
        }
    }
}