/// <summary>
        /// Initializes a new instance of the ManageMsolUserModel class.
        /// </summary>
        public ManageUsersViewModel()
        {
            IMsolCmdlet msolCmdlet = new GetUser()
            {
                All = true
            };

            PipelineReader <object> errors;
            ICollection <PSObject>  result;

            result = MsolCmdletWrapper.Instance.PipelineInvoke(msolCmdlet, out errors);

            if (result != null)
            {
                foreach (PSObject item in result)
                {
                    User user = TypeExtension.ToObject <User>(item.BaseObject);
                    ListUser.Add(user);
                }
            }
        }