Fetch all users and Groups from a site collection using c# client Object model

Question

I want to fetch all groups and users (outside of the the sharepoint group) from a Site collection using C# client object model. Currently i am bale to fetch all the groups and users inside those groups. But if i open Site permissions, and if any users are given permission directly (without including in any groups), how do i retrieve these user's? Please suggest.

Answer 1

Web.SiteUsers gives all users whether they are added in a group or added explicitly without being part of any group.

using (var clientContext = new ClientContext("http://aissp2013:90"))
{               
    Web web = clientContext.Web;
    UserCollection coll = web.SiteUsers;
    clientContext.Load(coll);
    clientContext.ExecuteQuery();
    foreach (User user in coll)
    {
        clientContext.Load(user.Groups);
        clientContext.ExecuteQuery();
        if (user.Groups.Count == 0)
        {
            Console.WriteLine(user.LoginName);
        }                    
    }
}