按属性合并自定义类列表

Question

我有一个自定义类工作日的列表：

class workdate
{
  string dayid;
  List<string> blocks;
}

Workdates.Add(new workdate("1", {"a","b","c"});
Workdates.Add(new workdate("2", {"a","b"});
Workdates.Add(new workdate("1", {"d","e","f"});

如何使用linq基于相同的日期合并列表项：

＆＃34; 1＆＃34;，{＆＃34; a＆＃34;，＆＃34; b＆＃34;，＆＃34; c＆＃34;，＆＃34; d＆＃34;，＆ ＃34; E＆＃34;＆＃34; F＆＃34;}

＆＃34; 2＆＃34;，{＆＃34; a＆＃34;，＆＃34; b＆＃34;}

Answer 1

Workdates.GroupBy(x => x.dayid)
         .Select(g => new workdate 
                      { 
                          dayid = g.Key, 
                          blocks = g.SelectMany(x => x.blocks).ToList()
                      }).ToList())