setPreference method of FirefoxOptions is not getting recognized through Selenium C#

Question

I am pretty new to C# and integrating with firefox.

So this might be a very basic newbie question :)

I have this code:

using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;

FirefoxOptions options = new FirefoxOptions();

options.setPreference("browser.download.folderList", 2);
options.setPreference("browser.download.dir", "C:\\Windows\\temp");
options.setPreference("browser.download.useDownloadDir", true);
options.setPreference("browser.helperApps.neverAsk.saveToDisk", "application/pdf");
options.setPreference("pdfjs.disabled", true);  // disable the built-in PDF viewer

The setPreference is marked with red. It is not recognized.

I have following installed:

What is missing?

Answer 1

FirefoxOptions.SetPreference Method (String, Int32)

FirefoxOptions.SetPreference Method (String, Int32) defines:

public void SetPreference(
    string preferenceName,
    int preferenceValue
)

So you need to replace:

options.setPreference("browser.download.folderList", 2);

With:

options.SetPreference("browser.download.folderList", 2);

---

FirefoxOptions.SetPreference Method (String, String)

FirefoxOptions.SetPreference Method (String, String) defines:

public void SetPreference(
    string preferenceName,
    string preferenceValue
)

So you need to replace:

options.setPreference("browser.download.dir", "C:\\Windows\\temp");
options.setPreference("browser.helperApps.neverAsk.saveToDisk", "application/pdf");

With:

options.SetPreference("browser.download.dir", "C:\\Windows\\temp");
options.SetPreference("browser.helperApps.neverAsk.saveToDisk", "application/pdf");

---

FirefoxOptions.SetPreference Method (String, Boolean)

FirefoxOptions.SetPreference Method (String, Boolean) defines:

public void SetPreference(
    string preferenceName,
    bool preferenceValue
)

So you need to replace:

options.setPreference("browser.download.useDownloadDir", true);
options.setPreference("pdfjs.disabled", true); 

With:

options.SetPreference("browser.download.useDownloadDir", true);
options.SetPreference("pdfjs.disabled", true);