CODEWITHSUNDEEP
c#linqforeachlambda
ruud
ruud

Reputation: 210

Lambda expression for nested foreach

how can I write lambda expression for the following nested foreach loops:

var temp= new List<Items>();
foreach (var item in dto.Items)
{
    temp.Add(item);
    foreach (var child in item.Children)
    {
      temp.Add(child);
   }
}

Upvotes: 1

Views: 1117

Answers (1)

Domysee
Domysee

Reputation: 12846

dto.Items.SelectMany(item => item.Children).Concat(dto.Items);

should do it.

Edit:

As xanatos mentioned, if you want to have the same order as your loops produce, you should use this instead:

dto.Items.SelectMany(item => new[] { item }.Concat(item.Children))

Upvotes: 5

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