XML file and data reading in C#

See more:

XML

data-binding

I have a 3D object and their data points. Data consists of 1000 points.
The following are for the data points.

public static List<myline> OpenProject(string _file)
        {
            List<myline> Lines = new List<myline>();
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(_file);
            XmlNodeList coordinates = doc.SelectNodes("/Siene/MyLine/Coordinates");
            foreach (XmlNode coordinat in coordinates)
            {
                int x1 = Int32.Parse(coordinat["Start"].Attributes["X"].Value);
                int y1 = Int32.Parse(coordinat["Start"].Attributes["Y"].Value);
                int z1 = Int32.Parse(coordinat["Start"].Attributes["Z"].Value);
                MyLine czg = new MyLine(x1, y1, z1);
                lines.Add(czg);
            }
            return lines;
        }

Instead of loading from an external file (doc.LoadXml(_file), the XML file must be in solution explorer and all data points must be able to read from there.
The line "doc.LoadXml(_file);" must e removed. That is, data reading from XML file must not need "OpenFileDialog" and must be inside the code.

Could you say me how it can be done.
Regards,
Mark