C# Linq Inner Join

Question

I want to select the persons only who are having pets.

when I execute the query

var query = from p in people
                        join
                   


        

Answer 1

Here's a different way to do it, adding only one line:

var query = from p in people
            join pts in pets
            on p equals pts.Owner into grp
            where grp.Any()             // <--- added this
            select new {grp=grp,PersonName=p.FirstName};

Here I select the groups, as you do, but I added one line that selects only the groups that contain at least one element, and ignore the rest.