The WebBrowser control is a full-featured web browser in a control that you can place on your form. You can use its Navigate method to make the browser go to a specific URL. You can also catch its Navigating event to decide whether to allow the browser to visit a site.

In this example, you can enter a URL in the TextBox and click Go to make the browser try to visit that site. Here's how the program navigates to the site you enter:

// Try to navigate to the entered URL.
private void btnGo_Click(object sender, EventArgs e)
{
    webBrowser1.Navigate(txtUrl.Text);
}

The program uses the following code to allow the browser to only go to the www.CSharpHelper.com web site.

// Verify that this is an allowed web site.
private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
    if (e.Url.Host != "www.csharphelper.com")
    {
        e.Cancel = true;
        MessageBox.Show("This web site is prohibited",
            "Prohibited", MessageBoxButtons.OK, 
            MessageBoxIcon.Exclamation);
    }
}

To test the program, you can enter another web site (such as Google or Yahoo) and click Go. You can also go to the CSharpHelper web site's Books page and click the links to try to go to Amazon.com or Amazon.co.uk.