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Selenium with C#

Your guide to run Selenium Webdriver tests with C# on BrowserStack.

Important: Sample test scripts are available in the csharp-browserstack repository.

The sample test script in this section is compatible with W3C-based client bindings. Check out our JSON wire protocol-based scripts in the selenium-3 branch of the repository.


BrowserStack gives you instant access to our Selenium Grid of 3000+ real devices and desktop browsers. Running your Selenium tests with C# on BrowserStack is simple. This guide will help you:

  1. Run your first test
  2. Mark tests as passed or failed
  3. Debug your app


  • You need to have BrowserStack Username and Access key, which you can find in your account settings. If you have not created an account yet, you can sign up for a Free Trial or purchase a plan.
  • Before you can start running your Selenium tests with C# you have to set up visual studio project with Selenium bindings as shown below (you can skip this section if you already have a working C# setup to run Selenium tests):
  1. Open visual studio and create a new empty project as shown below:

    Open visual studio and create a new empty project after filling required details
  2. Once the project is loaded go to File -> New File and create an empty C# file as shown below:

    Create empty C# file
  3. Go to Project -> Manage NuGet Packages as shown below:

    Selenium tests with C# Manage NuGet Packages
  4. Search for Webdriver and Select Selenium.WebDriver and Add Package as shown below:

    Create empty C# file

Now, your setup is ready to run the first Selenium test.

Run your first test

To get started, let’s run a simple Selenium Webdriver test. The C# script below opens the website, adds a product to the cart, verifies whether the product has been added to the cart, and then marks the test as passed or failed based on whether the product is available in the cart.

Step 1 - Create a sample test code file

Copy the following code into the empty class file that you created in the Pre-requisite step and save it as Parallel.cs:

using OpenQA.Selenium;
using OpenQA.Selenium.Remote;
using OpenQA.Selenium.Support.UI;
using OpenQA.Selenium.Safari;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Firefox;
using OpenQA.Selenium.Edge;
using OpenQA.Selenium.IE;
using System.Threading;
using System;
using System.Collections.Generic;
namespace MultiThreading
    class BrowserStackOptions : DriverOptions
        public BrowserStackOptions(String browser_name, String browser_version)
            this.BrowserName = browser_name;
            this.BrowserVersion = browser_version;

        public override void AddAdditionalCapability(string capabilityName, object capabilityValue)
            this.AddAdditionalOption(capabilityName, capabilityValue);

        public override ICapabilities ToCapabilities()
            IWritableCapabilities capabilities = this.GenerateDesiredCapabilities(true);

            return capabilities.AsReadOnly();

    class MultiThreading
        static void Main(string[] args)
            Dictionary<string, object> cap1 = new Dictionary<string, object>();
            cap1.Add("deviceName", "Samsung Galaxy S22 Plus");
            cap1.Add("browserName", "Samsung");
            cap1.Add("osVersion", "12.0");

            Dictionary<string, object> cap2 = new Dictionary<string, object>();
            cap2.Add("deviceName", "iPhone 12 pro");
            cap2.Add("osVersion", "14");
            cap2.Add("browserName", "ios");

            Dictionary<string, object> cap3 = new Dictionary<string, object>();
            cap3.Add("os", "OS X");
            cap3.Add("osVersion", "Big Sur");
            cap3.Add("browserName", "Firefox");
            cap3.Add("browserVersion", "latest");
            //Creating Threads and defining the browser and OS combinations where the test will run
            Thread t1 = new Thread(obj => sampleTestCase(cap1));
            Thread t2 = new Thread(obj => sampleTestCase(cap2));
            Thread t3 = new Thread(obj => sampleTestCase(cap3));
            //Executing the methods
        static void sampleTestCase(Dictionary<string, object> cap)
            // Update your credentials
            String BUILD_NAME = "browserstack-build-1";

            cap.Add("userName", BROWSERSTACK_USERNAME);
            cap.Add("accessKey", BROWSERSTACK_ACCESS_KEY);
            cap.Add("buildName", BUILD_NAME);
            String browserVersion = cap.ContainsKey("browserVersion") == true ? (string)cap["browserVersion"] : "";
            var browserstackOptions = new BrowserStackOptions((string)cap["browserName"], browserVersion);
            browserstackOptions.AddAdditionalOption("bstack:options", cap);
        //executeTestWithCaps function takes capabilities from 'sampleTestCase' function and executes the test
        static void executeTestWithCaps(DriverOptions capability)
            IWebDriver driver = new RemoteWebDriver(new Uri(""), capability);
                WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
                // getting name of the product
                String product_on_page = wait.Until(driver => driver.FindElement(By.XPath("//*[@id=\"1\"]/p"))).Text;
                // clicking the 'Add to Cart' button
                IWebElement cart_btn = driver.FindElement(By.XPath("//*[@id='1']/div[4]"));
                wait.Until(driver => cart_btn.Displayed);
                // waiting for the Cart pane to appear
                wait.Until(driver => driver.FindElement(By.ClassName("float-cart__content")).Displayed);
                // getting name of the product in the cart
                String product_in_cart = driver.FindElement(By.XPath("//*[@id='__next']/div/div/div[2]/div[2]/div[2]/div/div[3]/p[1]")).Text;
                if (product_on_page == product_in_cart)
                    ((IJavaScriptExecutor)driver).ExecuteScript("browserstack_executor: {\"action\": \"setSessionStatus\", \"arguments\": {\"status\":\"passed\", \"reason\": \" Product has been successfully added to the cart!\"}}");
                ((IJavaScriptExecutor)driver).ExecuteScript("browserstack_executor: {\"action\": \"setSessionStatus\", \"arguments\": {\"status\":\"failed\", \"reason\": \" Some elements failed to load.\"}}");
Warning: The driver.quit() statement is required, otherwise the test continues to execute, leading to a timeout.

Step 2 - Run the sample test code

Run the script using the following command:

dotnet run Program.cs parallel
Protip: You can use our capability builder and select from a wide range of custom capabilities that BrowserStack supports.

Step 3 - Verify the results

Once the test has run successfully, it is time to verify the results. The Selenium Webdriver test should have opened, added a product to the cart, verified whether the product has been added to the cart, and marked the test as passed or failed based on whether the product is available in the cart.

Note: Your results will be displayed on the command-line interface and on the Automate dashboard, where you can see Text Logs, Screenshots of every Selenium command, and a Video Recording of your entire test. (Read more about viewing test results and debugging failed tests)

Mark tests as passed or failed

BrowserStack does not know whether your test’s assertions have passed or failed because only the test script knows whether the assertions have passed. Therefore, based on the assertions on your script, you have to explicitly inform BrowserStack whether your tests have passed or not and this document will help you in doing that exactly.

It is possible to mark tests as either a pass or a fail and also give a reason for the same, using the following snippet:

// For marking test as passed
((IJavaScriptExecutor)driver).ExecuteScript("browserstack_executor: {\"action\": \"setSessionStatus\", \"arguments\": {\"status\":\"passed\", \"reason\": \" Yaay! my sample test passed\"}}");

// For marking test as failed
((IJavaScriptExecutor)driver).ExecuteScript("browserstack_executor: {\"action\": \"setSessionStatus\", \"arguments\": {\"status\":\"failed\", \"reason\": \" Oops! my test failed \"}}");

You can refer to the sample script, given in Step 1, to learn implementation of this code snippet.

Note: The arguments passed in the JavaScript method for setting the status and the corresponding reason for the test are status and reason.
  • status accepts either passed or failed as the value
  • reason accepts a value in string datatype

Marking test as pass/fail is also possible using our REST API at any point in the test or also after the test has concluded. You can read more about marking test using REST API and use it, if it fits your use case.

Debug your app

BrowserStack provides a range of debugging tools to help you quickly identify and fix bugs you discover through your automated tests.

Text logs

Text Logs are a comprehensive record of your test. They are used to identify all the steps executed in the test and troubleshoot errors for the failed step. Text Logs are accessible from the Automate dashboard or via our REST API.

Visual logs

Visual Logs automatically capture the screenshots generated at every Selenium command run through your C# script. Visual logs help with debugging the exact step and the page where failure occurred. They also help identify any layout or design related issues with your web pages on different browsers.

Visual Logs are disabled by default. In order to enable Visual Logs you will need to set browserstack.debug capability to true:

capability.AddAdditionalCapability("browserstack.debug", "true", true);

Sample Visual Logs from Automate Dashboard: BrowserStack Automate Visual Logs

Video recording

Every test run on the BrowserStack Selenium grid is recorded exactly as it is executed on our remote machine. This feature is particularly helpful whenever a browser test fails. You can access videos from Automate Dashboard for each session. You can also download the videos from the Dashboard or retrieve a link to download the video using our REST API.

Note: Video recording increases test execution time slightly. You can disable this feature by setting the capability to false.

In addition to these logs BrowserStack also provides Raw logs, Network logs, Console logs, Selenium logs, Appium logs and Interactive session. Read more about enabling all the debugging options.

Next steps

Once you have successfully run your first test on BrowserStack, you might want to do one of the following:

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