get users by group in sharepoint

Question

can anyone show me how to get the users within a certain group using sharepoint?

so i have a list that contains users and or groups. i want to retrieve all users in that

Answer 1

private bool IsMember()
    {
        bool isMember;
        SPSite site = new SPSite(SiteURL);
        SPWeb web = site.OpenWeb();
        isMember = web.IsCurrentUserMemberOfGroup(web.Groups["GroupName"].ID);
        web.Close();
        site.Close();
        return isMember;
    }