(Linq) linq T Type Join result T Type

public class User
{
    public int UserId { get; set; }
    public string UserName { get; set; }
    public string Email { get; set; }
    public string CompanyName { get; set; }
}

var users = from A in A_Users
                 join B in B_Users on u.UserId equals mem.UserId
                select new User
                {
                    UserId = A.UserId,
                    UserName = A.UserName,
                    Email = A.Email,
                    CompanyName = companies.CompanyName
                 };