selenium popup example in c#

 
// waiting for popup to open 
while (this.driver.WindowHandles.Count == 1) 
{ 
        this.WaitASec(); 
} 
 
this.WaitASec(); 
 
// save the current window handle. 
String parentWindowHandle = driver.CurrentWindowHandle; 
IWebDriver popup = null; 
var windowIterator = driver.WindowHandles; 
bool onefound = false; 
 
//enumerate through all windows to make sure at least one contains required text 
foreach (var windowHandle in windowIterator) 
{ 
        popup = driver.SwitchTo().Window(windowHandle); 
        if (textPresent != "") 
        { 
                onefound=Regex.IsMatch(popup.FindElement(By.CssSelector("BODY")).Text, "^[\\s\\S]*" + textPresent + "[\\s\\S]*$"); 
        } 
} 
Assert.IsTrue(onefound,"No text was found "+textPresent);