问Selenium无法使用edge IE模式C#处理新窗口

EN

   var ieService = InternetExplorerDriverService.CreateDefaultService(dir, driver); 
    var ieOptions = new InternetExplorerOptions{}; 
    ieOptions.AddAdditionalCapability("ie.edgechromium", true); 
    ieOptions.AddAdditionalCapability("ie.edgepath", "{path to msedge.exe}"); 

    var webdriver = new InternetExplorerDriver(ieService, ieOptions, TimeSpan.FromSeconds(30)); 

driver.FindElement(By.Id("button")).Click(); 
 
Thread.Sleep(2000); 

string popupHandle = string.Empty; 
ReadOnlyCollection<string> windowHandles = driver.WindowHandles;  

foreach (string handle in windowHandles)  
{  
    if (handle != existingWindowHandle)  
    {  
         popupHandle = handle;
         break;  
    }  
}  
driver.SwitchTo().Window(popupHandle);