Nested “from” LINQ query expressed with extension methods

Question

How can I write this LINQ query by using the extension method syntax?

var query = from a in sequenceA
            from b in sequenceB
            select ...;         


        

Answer 1

Another way to write it would be:

var query = a.Join(b, i => new { }, j => new { }, (i, j) => new { i = i, j = j });