C# LINQ分组与计数

我知道这个问题和我之前的一个问题很相似，但我想不出来

数据：

正在查找此输出：

dept  needOn    status   count
foo   5/1/2011  closed   4
foo   5/1/2011  open     2

我认为这会奏效：

var query3 = from q3 in query2
             group new { q3.Status }
                by new { q3.Dept, q3.NeedOnWeek, q3.Status } into g
             select new
             {
                 dept = g.Key.Dept,
                 needOnWeek = g.Key.NeedOnWeek,
                 status = g.Key.Status,
                 count = g.Count(x => x.Status)
             };

这两个错误都适用于：

count=g.count（x=>x.Status）

错误1无法将lambda表达式转换为委托类型“System.Func”，因为块中的某些返回类型不能隐式转换为委托返回类型

错误2无法将类型“string”隐式转换为“bool”

谢谢你的耐心和帮助

var query3 = from q3 in query2
             group q3
                by new { q3.Dept, q3.NeedOnWeek, q3.Status } into g
             select new
             {
                 dept = g.Key.Dept,
                 needOnWeek = g.Key.NeedOnWeek,
                 status = g.Key.Status,
                 count = g.Count()
             };

var query3 = from q3 in query2
             group q3
                by new { q3.Dept, q3.NeedOnWeek, q3.Status } into g
             select new
             {
                 dept = g.Key.Dept,
                 needOnWeek = g.Key.NeedOnWeek,
                 status = g.Key.Status,
                 count = g.Count()
             };