SerializationInfoEnumerator.cs

using System.Collections;
using System.Runtime.InteropServices;

namespace System.Runtime.Serialization
{
    [ComVisible(true)]
    public sealed class SerializationInfoEnumerator : IEnumerator
    {
        private string[] m_members;

        private object[] m_data;

        private Type[] m_types;

        private int m_numItems;

        private int m_currItem;

        private bool m_current;

        object IEnumerator.Current
        {
            get
            {
                if (!m_current)
                {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                }
                return new SerializationEntry(m_members[m_currItem], m_data[m_currItem], m_types[m_currItem]);
            }
        }

        public SerializationEntry Current
        {
            get
            {
                if (!m_current)
                {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                }
                return new SerializationEntry(m_members[m_currItem], m_data[m_currItem], m_types[m_currItem]);
            }
        }

        public string Name
        {
            get
            {
                if (!m_current)
                {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                }
                return m_members[m_currItem];
            }
        }

        public object Value
        {
            get
            {
                if (!m_current)
                {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                }
                return m_data[m_currItem];
            }
        }

        public Type ObjectType
        {
            get
            {
                if (!m_current)
                {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                }
                return m_types[m_currItem];
            }
        }

        internal SerializationInfoEnumerator(string[] members, object[] info, Type[] types, int numItems)
        {
            m_members = members;
            m_data = info;
            m_types = types;
            m_numItems = numItems - 1;
            m_currItem = -1;
            m_current = false;
        }

        public bool MoveNext()
        {
            if (m_currItem < m_numItems)
            {
                m_currItem++;
                m_current = true;
            }
            else
            {
                m_current = false;
            }
            return m_current;
        }

        public void Reset()
        {
            m_currItem = -1;
            m_current = false;
        }
    }
}