急求一个比较器写法

[我2我骄傲]

public class Cell : IEquatable<Cell>
        {
            public bool Equals(Cell other)
            {
                if (other == null) return false;
                if (this == other) return true;
                return this.WhatDay == other.WhatDay && this.Lesson == other.Lesson;
            }

            /// <summary>
            /// 星期几
            /// </summary>
            public int WhatDay { get; set; }

            /// <summary>
            /// 第几节课
            /// </summary>
            public int Lesson { get; set; }

        }
        
        public class WeekCell
        {
            public WeekCell()
            {
                CellList = new List<Cell>();
            }

            //周
            public int Week 
            { 
                get; 
                set;
            }

            //节次
            public List<Cell> CellList
            {
                get;
                set;
            }
        }

上面是两个类

现在有一个List<WeekCell>
比如里面的数据是 （代码就随便写了，不要在乎语法）
week=1 List<Cell> = {whatday=1,lesson=1},{whatday=1,lesson=2}
week=2 List<Cell> = {whatday=1,lesson=1},{whatday=1,lesson=2}
week=1 List<Cell> = {whatday=1,lesson=2,{whatday=1,lesson=3}

我现在想得到的结果是List<WeekCell> 里面的数据是
week=1 List<Cell> = {whatday=1,lesson=1},{whatday=1,lesson=2},{whatday=1,lesson=3}
week=2 List<Cell> = {whatday=1,lesson=1},{whatday=1,lesson=2}

[我2我骄傲]

shingoscar 麻烦帮忙看看，另外不一定是比较器

[我2我骄傲]

不要沉下去，。。。。。。

[Poopaye]

listWeekCell
	.GroupBy(weekCell => weekCell.Week)
	.Select(item => new WeekCell
	{
		Week = item.Key,
		CellList = item.SelectMany(weekCell => weekCell.CellList).Distinct().ToList()
	});

Cell还要重写GetHashCode

public class Cell : IEquatable<Cell>
{
	//...

	public override int GetHashCode()
	{
		return this.WhatDay * 33 + this.Lesson;
	}
}

[我2我骄傲]

谢谢！LINQ 简单的还可以 ，复杂的 就不是很熟悉了。。。。