Try this
using SHDocVw;
using Shell32;
namespace CSBrowserHelperObject
{
class Program
{
static private SHDocVw.InternetExplorer m_IExplorer = null;
static private IWebBrowserApp m_WebBrowser = null;
public static void Main(string[] args)
{
Shell shell = new Shell32.Shell();
ShellWindows ies = (ShellWindows)shell.Windows();
InternetExplorer ie;
for (int i = 0; i < ies.Count; i++)
{
ie = (InternetExplorer)ies.Item(i);
ie.ToolBar = 0;
}
}
}
}