driver.FindElement(By.Id(\"inputUsername\")).SendKeys(\"aca\");
driver.FindElement(By.Id(\"inputPassword\")).SendKeys(\"123\");
driver.FindElement(By.TagName(\"butto
You need to make sure to reference the NuGet Package Selenium.Support.
I was having the same issue and then realized that I was only referencing the Selenium.WebDriver NuGet Package. After adding the Selenium.Support NuGet package, and adding the proper using statements. My SelectElement code successfully compiled.
The proper using statements
using OpenQA.Selenium;
using OpenQA.Selenium.Support.UI;