泛型List 扩展 比较类

List<string> outputList = resultList.Distinct(new Compare<string>((x, y) => (null != x && null != y) && (x == y))).ToList();//去除重复项

#region 泛型类扩展
    public delegate bool EqualsComparer<T>(T x, T y);

    public class Compare<T> : IEqualityComparer<T>
    {
        private EqualsComparer<T> _equalsComparer;

        public Compare(EqualsComparer<T> equalsComparer)
        {
            this._equalsComparer = equalsComparer;
        }

        public bool Equals(T x, T y)
        {
            if (null != this._equalsComparer)
                return this._equalsComparer(x, y);
            else
                return false;
        }

        public int GetHashCode(T obj)
        {
            return obj.ToString().GetHashCode();
        }
    }
    #endregion