using System;

public class Program

{

    public static void Main()

    {

        string pathRecording = "C:\\Playground\\NATO\\CSD_DATA\\IPL\\WebappUploads\\";

        string sessionId = Guid.NewGuid().ToString();

        //nice filename

        string uri = sessionId + "-" + "AAA.aspx";

        var absoluteUri = new Uri(new Uri("file:///" + pathRecording), new Uri(uri, UriKind.Relative));

        Console.WriteLine(absoluteUri);

        //pentest filename

        uri = sessionId + "-" + "\\..\\..\\..\\..\\CSD_SW\\IPL\\WebApp\\UI\\AAA.aspx";

        absoluteUri = new Uri(new Uri("file:///" + pathRecording), new Uri(uri, UriKind.Relative));

        Console.WriteLine(absoluteUri);

    }

}