Using Linq select list inside list

Question

Using LINQ how to select from a List within a List

public class Model
{
    public string application { get; set; }

    public List users { get; se         


        

Answer 1

list.Where(m => m.application == "applicationName" && 
           m.users.Any(u => u.surname=="surname"));

if you want to filter users as TimSchmelter commented, you can use

list.Where(m => m.application == "applicationName")
    .Select(m => new Model
    {
        application = m.application,
        users = m.users.Where(u => u.surname=="surname").ToList()
    });