如何从c#中的API访问和使用XML

My goal is to pull XML data from the API and load it to a sql server database. The first step I'm attempting here is to access the data and display it. Once I get this to work I'll loop through each row and insert the values into a sql server database. When I try to run the code below nothing happens and when I paste the url directly into the browser I get this errorMy goal is to pull XML data from the API and lo