[Test]
public void SearchForTest()
{
    IWebElement searchbox = _driver.FindElement(By.Name("q"));

    searchbox.SendKeys("Test");
    searchbox.SendKeys(Keys.Enter); //send [enter] key to the control.

    Assert.AreEqual("Test - Google Search", _driver.Title);
}

[Test]
public void SearchForTestAndFindResult()
{
    IWebElement searchbox = _driver.FindElement(By.Name("q"));

    searchbox.SendKeys("test");
    searchbox.SendKeys(Keys.Enter); //send [enter] key to the control.

    Assert.IsNotNull(_driver.FindElement(By.LinkText("Test Central")));
}

[Test]
public void SearchForSelenium()
{
    IWebElement searchbox = _driver.FindElement(By.Name("q"));

    searchbox.SendKeys("Selenium");
    searchbox.Submit(); //submits the form that the control is on.

    Assert.AreEqual("Selenium - Google Search", _driver.Title);
}