sharepoint Groups. Retrieving all users in all groups of a site collection


Example

ClientContext clientContext = new ClientContext("http://MyServer/sites/MySiteCollection");
GroupCollection collGroup = clientContext.Web.SiteGroups;

clientContext.Load(collGroup);

clientContext.Load(collGroup,
    groups => groups.Include(
        group => group.Users));

clientContext.ExecuteQuery();

foreach (Group oGroup in collGroup)
{
    UserCollection collUser = oGroup.Users;

    foreach (User oUser in collUser)
    {
        Console.WriteLine("Group ID: {0} Group Title: {1} User: {2} Login Name: {3}", 
            oGroup.Id, oGroup.Title, oUser.Title, oUser.LoginName);
    }
}