Group class

Represents a group on a Microsoft SharePoint Foundation Web site.

Namespace:  Microsoft.SharePoint.Client
Assembly:  Microsoft.SharePoint.Client (in Microsoft.SharePoint.Client.dll)

public sealed class Group : Principal

Group represents a collection of users. Every group can be represented by an SPMember object and has a unique member identifier.

This code example adds the current user to the visitors group on the current site.

using System;
using Microsoft.SharePoint.Client;

namespace Microsoft.SDK.SharePointFoundation.Samples
    class GroupExample
        static void Main()
            string siteUrl = "http://MyServer/sites/MySiteCollection";

            ClientContext clientContext = new ClientContext(siteUrl);
            Web site = clientContext.Web;
            GroupCollection collGroup = site.SiteGroups;

            // Get the visitors group, assuming its ID is 4.
            Group visitorsGroup = collGroup.GetById(4);

            User currentUser = site.CurrentUser;
            UserCollection collUser = visitorsGroup.Users;


            Console.WriteLine(currentUser.Title + " added to group " + visitorsGroup.Title);

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.