How to call XML file in controller in nopcommerce 4.2

I created one xml file and that file I want to call in controller in nopcommerce 4.2. As per the .net multiple ways to call in which one of the solution is

//Controller code

string m_menuPath = ConfigurationManager.AppSettings["XmlMenuPath"];
document m_xDocument = XDocument.Load(Server.MapPath(m_menuPath));

this is not working showing error that
=> Using the generic type 'ConfigurationManager<T> requires 1 type arguments (first line error)
=> Server does not exist (second line error)

and same other code is also not working.
Note : this code is not working in nopcommerce only while in simple .net mvc its working verywell.

So, whats the way to call the xml file in controller in nopcommerce 4.2?

Do you want read XML file? If yes then follow use this code

var siteMap = new XmlSiteMap();
siteMap.LoadFrom("~/XML_FILE_PATH.ext");