Selenium C# WebDriver Get the Browser is opened with Session or not

It seems like you want to reuse an existing Chrome session if it's available instead of creating a new one when calling the getWebDriver method with a session ID. However, Selenium WebDriver doesn't directly support attaching to an existing browser session using session ID like this. Each WebDriver instance starts its own browser session.

However, you can achieve session reuse using the Chrome DevTools Protocol (CDP) and the Chrome DevTools NuGet package. Here's a basic outline of how you could approach it:

1. Use the Chrome DevTools Protocol to interact with the existing Chrome browser session.
2. You need to identify the existing Chrome process and its debugger port.
3. Use the Chrome DevTools NuGet package to connect to the existing session.

Here's an example of how you might modify your code to achieve this:

using ChromeDevTools;
using ChromeDevTools.Protocol;
using ChromeDevTools.Protocol.Chrome.DOM;
using OpenQA.Selenium.Chrome;

public static ChromeDriver GetWebDriver(string sessionId)
{
    try
    {
        // Connect to an existing Chrome session using Chrome DevTools Protocol
        var chromeSession = ChromeSession.ConnectToExistingInstance(sessionId);

        // Attach Chrome DevTools
        var devTools = chromeSession.GetDevTools();

        // Set up Chrome options
        ChromeOptions chromeOptions = new ChromeOptions();
        chromeOptions.AddArguments("--window-size=1920,1080");
        chromeOptions.AddArguments("--disable-gpu");
        // Add other options as needed

        // Attach to the existing session
        var chromewebDriver = new ChromeDriver(chromeOptions);
        return chromewebDriver;
    }
    catch (Exception ex)
    {
        // Handle exception
    }
    return null;
}

In this example, ChromeSession.ConnectToExistingInstance(sessionId) attempts to connect to an existing Chrome session using the provided session ID. Then, it attaches Chrome DevTools to the existing session. Finally, it initializes a new ChromeDriver instance using the existing session.

Please note that the ChromeSession class and related methods come from the Chrome DevTools NuGet package. You'll need to install this package in your project to use them.

This approach allows you to reuse an existing Chrome session if it's available. However, keep in mind that managing browser sessions and attaching to existing sessions can be complex and may have limitations depending on your specific requirements and environment.