您可以更改顺序，然后使用ForEach运算符:

You can change the order, then use the ForEach operator:

tickets
   .Where(x => x.Name == "Beach")
   .ToList()
   .ForEach(x => { x.Selected = true; });

注意:

• 由于IEnumerable在Linq中不支持ForEach，因此需要ToList()-请参见 LINQ相当于IEnumerable< T>
的foreach
• 出于可读性考虑，***将其分离为linq查询，然后再使用更常规的foreach(x in list) C#循环
• 如果这是linq-to-sql，则需要调用SubmitChanges()才能保留更改.

• that the ToList() is needed because IEnumerable doesn't support ForEach in Linq - see LINQ equivalent of foreach for IEnumerable<T>
• that for readability it might be better to separate this out into a linq query and then a more conventional foreach(x in list) C# loop
• if this is linq-to-sql, then you'll need to call SubmitChanges() in order to persist your changes.