Question

Here is the code:

public IEnumerable<SomeItem> DescendantsAndSelf()
{
    yield return this;
    foreach (var item in Children.SelectMany(x => x.DescendantsAndSelf())
    {
        yield return item;
    }
}

I got this code from here:
https://stackoverflow.com/a/4814278/184773

This is a recursive linq query. i want to implement this but afraid it my bring my server down. Do you know if this performans multiple run trips to the server?

Answer 1

If you want to make just one call you could implement a recursive query in SQL using a recursive CTE and expose it to your application as a stored procedure which can be called from LINQ.