static void Main(string[] args)
{
var tree = new List <List <List <Foo> > >
{
new List <List <Foo> >
{
new List <Foo> {
new Foo("a"), new Foo("b")
},
new List <Foo> {
new Foo("c")
}
},
new List <List <Foo> >
{
new List <Foo> {
new Foo("x"), new Foo("y")
}
}
};
IEnumerable <Tuple <Foo, int> > result = tree.SelectMany((L1, i) => L1.SelectMany(L2 => L2.Select(k => Tuple.Create(k, i))));
foreach (var si in result)
{
Console.WriteLine(si.Item1.s + ' ' + si.Item2);
}
}
static void Main(string[] args)
{
var tree = new List <List <List <string> > >
{
new List <List <string> >
{
new List <string> {
"a", "b"
},
new List <string> {
"c"
}
},
new List <List <string> >
{
new List <string> {
"x", "y"
}
}
};
IEnumerable <Tuple <string, int> > result = tree.SelectMany((L1, i) => L1.SelectMany(L2 => L2.Select(k => Tuple.Create(k, i))));
foreach (var si in result)
{
Console.WriteLine(si.Item1 + ' ' + si.Item2);
}
}