linq string.contains on field of child object list

Question

How can the linq statement here be altered so that it finds the company(s) containing the user with the substring of \"third\"?

At the moment it only works when sear

Answer 1

You should call string.Contains on the user.Name:

companies = companies
    .Where(company => company.Users.Any(user => user.Name.Contains("third")))
    .ToList();

See it working online: ideone