/// <summary>
/// Get user or group of specified name
/// </summary>
/// <param name="clientContext">Client context</param>
/// <param name="groupName">Group or user name</param>
/// <returns>Role Assignment</returns>
private static RoleAssignment GetGroup(ClientContext clientContext, string groupName)
{
RoleAssignmentCollection roles = clientContext.Web.RoleAssignments;
clientContext.Load(roles, item => item.Include(items => items.Member.Title));
clientContext.ExecuteQuery();
RoleAssignment group = roles.Where(role => role.Member.Title == groupName).FirstOrDefault();
clientContext.Load(group, item => item.Member.Title);
clientContext.ExecuteQuery();
return(group);
}
