Recursive LINQ query: select item and all children with subchildren

Question

Is there any way to write a LINQ (or procedural style) query, that can select an item and all children with one query? I have entity:

public class Comment
{
         


        

Answer 1

IEnumerable GetChild(int id)
{
    return table.Where(x => x.ParentID == id || x.Id== id)
                .Union(table.Where(x => x.ParentID == id)
                            .SelectMany(y => GetChild(y.Id))
    );
}