Get all users and groups client object model sharepoint 2010

function GetUsersGroups()
{
ClientContext context = new Microsoft.SharePoint.Client.ClientContext(“http://SPSite”);
GroupCollection groupCollection = context.Web.SiteGroups;
context.Load(groupCollection,
groups = > groups.Include(
group = > group.Users));
context.ExecuteQuery();
foreach (Group group in groupCollection)
{
UserCollection userCollection = group.Users;
foreach (User user in userCollection)
{
MessageBox.Show(“User Name: ” + user.Title + ” Email: ” +
user.Email + ” Login: ” + user.LoginName);
}
}
//Iterate the owners group
Group ownerGroup = context.Web.AssociatedOwnerGroup;
context.Load(ownerGroup);
context.Load(ownerGroup.Users);
context.ExecuteQuery();
foreach (User ownerUser in ownerGroup.Users)
{
MessageBox.Show(“User Name: ” + ownerUser.Title + ” Email: ” +
ownerUser.Email + ” Login: ” + ownerUser.LoginName);
}
context.Dispose();
}