public class SortableBindingList<T> : BindingList<T>
        {
            private bool isSortedCore = true;
            private ListSortDirection sortDirectionCore = ListSortDirection.Ascending;
            private PropertyDescriptor sortPropertyCore = null;
            private string defaultSortItem;

            public SortableBindingList() : base() { }

            public SortableBindingList(IList<T> list) : base(list) { }

            protected override bool SupportsSortingCore
            {
                get { return true; }
            }

            protected override bool SupportsSearchingCore
            {
                get { return true; }
            }

            protected override bool IsSortedCore
            {
                get { return isSortedCore; }
            }

            protected override ListSortDirection SortDirectionCore
            {
                get { return sortDirectionCore; }
            }

            protected override PropertyDescriptor SortPropertyCore
            {
                get { return sortPropertyCore; }
            }

            protected override int FindCore(PropertyDescriptor prop, object key)
            {
                for (int i = 0; i < this.Count; i++)
                {
                    if (Equals(prop.GetValue(this[i]), key)) return i;
                }
                return -1;
            }

            protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction)
            {
                isSortedCore = true;
                sortPropertyCore = prop;
                sortDirectionCore = direction;
                Sort();
            }

            protected override void RemoveSortCore()
            {
                if (isSortedCore)
                {
                    isSortedCore = false;
                    sortPropertyCore = null;
                    sortDirectionCore = ListSortDirection.Ascending;
                    Sort();
                }
            }

            public string DefaultSortItem
            {
                get { return defaultSortItem; }
                set
                {
                    if (defaultSortItem != value)
                    {
                        defaultSortItem = value;
                        Sort();
                    }
                }
            }

            private void Sort()
            {
                List<T> list = (this.Items as List<T>);
                list.Sort(CompareCore);
                ResetBindings();
            }

            private int CompareCore(T o1, T o2)
            {
                int ret = 0;
                if (SortPropertyCore != null)
                {
                    ret = CompareValue(SortPropertyCore.GetValue(o1), SortPropertyCore.GetValue(o2), SortPropertyCore.PropertyType);
                }
                if (ret == 0 && DefaultSortItem != null)
                {
                    PropertyInfo property = typeof(T).GetProperty(DefaultSortItem, BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.IgnoreCase, null, null, new Type[0], null);
                    if (property != null)
                    {
                        ret = CompareValue(property.GetValue(o1, null)