去掉重复 List<T>.Distinct(）

1.实现方法

        public delegate bool EqualsComparer<T>(T x, T y);
        /// <summary>
        /// 去除List重复项
        /// </summary>
        /// <typeparam name="T"></typeparam>
        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();
            }
        }

2.开始去除重复项

List<T> task = List<T>.Distinct(new Compare<Task>((x, y) => (null != x && null != y) && (x.PrimaryKeyTypeID == y.PrimaryKeyTypeID))).ToList();
                

完成！