ClientContext client = new ClientContext(“http://SiteUrl”);
client.ExecuteQuery();
Web website
= client.Web;
client.Load(website,
w => w.AllProperties, w => w.SiteGroups, w => w.SiteUserInfoList, w
=> w.Webs,w => w.Title);
client.ExecuteQuery();
GroupCollection groupCollection = website.SiteGroups;
client.Load(groupCollection,
groups => groups.Include(grps => grps.Users, grps => grps.Title));
client.ExecuteQuery();
User
user;
foreach (Group group in groupCollection)
{
if
(group.Title.Equals(“GroupName”))
{
UserCreationInformation userInfo = new UserCreationInformation();
userInfo.LoginName = “UserName”;
if (“Add”)
{
user = group.Users.Add(userInfo);
group.Users.AddUser(user);
}
else if (“Remove”)
{
user = group.Users.GetByLoginName(“UserName”);
group.Users.Remove(user);
}
group.Update();
website.Update();
client.ExecuteQuery();
}
}