C# - 组合具有相同属性的多个LINQ集合

Question

也许是深夜,但我在这里难倒.我正在尝试将具有相同属性的多个列表合并为一个.我认为LINQ的.UNION可以做到这一点,但我错了.这是我的一些列表的示例:

LIST1 (report names):
Date      Name    Title         Product
02/01/13  Steve   Hello World   Report
02/05/13  Greg    Howdy         Report

LIST2 (song names):
Date      Name    Title         Product
01/01/13  John    Time          Song
01/05/13  Bob     Sorry         Song

LIST3 (games names):
Date      Name      Title         Product
12/01/12  Google    Bike Race     Game
12/05/12  Apple     Temple Run    Game

我的课非常简单.这是它的样子:

public class MyClass {
  public DateTime Date { get; set; }
  public string Name { get; set; }
  public string Title { get; set; }
  public string Product { get; set; }
}

如果您想知道,我使用此LINQ查询来获取上述列表之一:

var finalList = Games
  .Select (s => new MyClass { 
    Date = (System.DateTime) s.Games.Creation_date,
    Name = s.Games.Last_name,
    Title = string.Format("{0} (Report)", s.Game.Headline),
    Product="Report"
  })
  ;

到目前为止,它很简单,但我希望将所有列表合并为1.因此,我的最终列表应如下所示:

Date      Name    Title         Product
02/01/13  Steve   Hello World   Report
02/05/13  Greg    Howdy         Report
01/01/13  John    Time          Song
01/05/13  Bob     Sorry         Song
12/01/12  Google  Bike Race     Game
12/05/12  Apple   Temple Run    Game

我认为UNION命令会这样做:

var newList = List1.Union(List2).Union(List3);

但我没有得到理想的输出.

Date      Name    Title         Product
02/01/13  Steve   Hello World   Report
02/05/13  Greg    Howdy         Report
01/01/13  Bob     Time          Game
01/05/13  John    Sorry         Song
12/01/12  Google  Bike Race     Song
12/05/12  Apple   Temple Run    Game

我在这里做错了什么？

Answer 1

尝试:

list1.Concat(list2).Concat(list3);

你不想使用Union(工作与否),因为它确实设置了联合.