GroupMbrInq

private void ButtonGroupMbrInqClick(object sender, RoutedEventArgs e)
{
    try
    {
        // group name is an Active Directory group
        var groupName = "Domain Users";

        var groupMbrInq = new GroupMbrInqRq_MType()
        {
            GroupName = groupName
        };

        var callback = this.messageBus.Send(groupMbrInq).RegisterResponseHandler(this.OnGroupMbrInqResponse);
        var errors = Helper.CallbackErrors(callback, "ButtonGroupMbrInqClick");
        if (!string.IsNullOrWhiteSpace(errors))
        {
            this.UpdateListbox(errors);
        }
    }
    catch (Exception ex)
    {
    }
}