组。将用户添加到 SharePoint 组

ClientContext clientContext = new ClientContext("http://MyServer/sites/MySiteCollection ");
GroupCollection collGroup = clientContext.Web.SiteGroups;
Group oGroup = collGroup.GetById(6);

UserCreationInformation userCreationInfo = new UserCreationInformation();
userCreationInfo.Email = "alias@somewhere.com";
userCreationInfo.LoginName = @"DOMAIN\alias";
userCreationInfo.Title = "John";

User oUser = oGroup.Users.Add(userCreationInfo);

clientContext.ExecuteQuery();