using System;
using System.Runtime.InteropServices;
using System.Text;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
using System.Linq;
using System.Threading;

namespace ConsoleApp1
{
	class Program
	{
		static Boolean isEncodingRegistered = !RuntimeInformation.FrameworkDescription.Contains("Core");

		static FirefoxDriverService service;
		static IWebDriver webDriver;

		private static void RegisterEncoding()
		{
			if (!isEncodingRegistered)
			{
				Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
				isEncodingRegistered = true;
			}
		}

		static Program()
		{
			RegisterEncoding();
			string driverPath = $@"{AppDomain.CurrentDomain.BaseDirectory}";

			service = FirefoxDriverService.CreateDefaultService(driverPath);
			Console.WriteLine("SERVICE");
			FirefoxOptions options = new FirefoxOptions();
			Console.WriteLine("OPTIONS");
			options.AcceptInsecureCertificates = true;
			options.UseLegacyImplementation = true;
			options.Profile = new FirefoxProfile();
			Console.WriteLine("PROFILE");
			webDriver = new FirefoxDriver(service, options);
			Console.WriteLine("DRIVER");
			webDriver.Navigate().GoToUrl("https://www.selenium.dev/");			
			webDriver.FindElements(By.ClassName("nav-item")).FirstOrDefault().Click();
			webDriver.FindElement(By.Name("search")).SendKeys("Nothing");
			webDriver.FindElement(By.Name("search")).SendKeys(Keys.Enter);
		}

		static void Main(string[] args)
		{
			Thread.Sleep(250);
			try
			{
				webDriver.FindElement(By.ClassName("gsc-search-button-v2"));
				Console.WriteLine("Element found");
			}
			catch (Exception ex)
			{
				Console.WriteLine(ex);
				Console.WriteLine("Element not found");
			}


			Console.WriteLine("Press any key to exit.");
			Console.ReadKey();

			webDriver.Close();
			service.Dispose();
		}
	}
}

SERVICE
OPTIONS
Unhandled Exception: System.TypeInitializationException: A type initializer threw an exception. To determine which type, inspect the InnerException's StackTrace property.
 ---> System.PlatformNotSupportedException: Operation is not supported on this platform.
   at System.Reflection.Assembly.GetCallingAssembly() + 0x5e
   at OpenQA.Selenium.Internal.ResourceUtilities.GetResourceStream(String, String) + 0xd0
   at OpenQA.Selenium.Firefox.FirefoxProfile.ReadDefaultPreferences() + 0x2b
   at OpenQA.Selenium.Firefox.FirefoxProfile..ctor(String, Boolean) + 0x73
   at ConsoleApp1.Program..cctor() + 0x14b
   at System.Runtime.CompilerServices.ClassConstructorRunner.EnsureClassConstructorRun(StaticClassConstructionContext*) + 0xd3
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.ClassConstructorRunner.EnsureClassConstructorRun(StaticClassConstructionContext*) + 0x186
   at System.Runtime.CompilerServices.ClassConstructorRunner.CheckStaticClassConstructionReturnNonGCStaticBase(StaticClassConstructionContext*, IntPtr) + 0xd
   at ConsoleApp1.Program.Main(String[]) + 0x10
   at ConsoleApp1!<BaseAddress>+0x6a1d15