How to get Media Url from C#

First both

businesslogic.dll and cms.dll need to be referenced.

var nodeId = int.Parse(id);

var node = new Node(nodeId);

var screenshotOneMediaId = int.Parse(node.GetProperty("screenshotOne").Value);

var screenshotOneMedia = new Media(screenshotOneMediaId);

var screenshotOneMediaUrl = screenshotOneMedia.getProperty("umbracoFile").Value.ToString();