Best method for comparing XML with string

I am looking for the best way to compare XML data with a string. the data is stored in a xml called test.xml, and must be compared with the name descendant, if there is a match more info from the xml must be added to a textbox and picture box.

My ( working ) code:

        var xmlDocument = XDocument.Load("test.xml");               // XML koppellen
        var key1 = xmlDocument.Descendants("NAME");                 // XML filepath
        var key2 = xmlDocument.Descendants("TITLE");                // XML titel
        var key3 = xmlDocument.Descendants("BRAND");                // XML afbeelding
        var key4 = xmlDocument.Descendants("TYPE");                 // XML merk
        var key5 = xmlDocument.Descendants("SOORT");                // XML type
        var key6 = xmlDocument.Descendants("NAAM");                 // XML naam

        List<string> file = new List<string>();
        List<string> title = new List<string>();
        List<string> brand = new List<string>();
        List<string> type = new List<string>();
        List<string> soort = new List<string>();
        List<string> naam = new List<string>();

        int i = 0;

        foreach (var key in key1)
        {
            file.Add(key.Value.Trim());
        }

        foreach (var key in key2)
        {
            title.Add(key.Value.Trim());
        }

        foreach (var key in key3)
        {
            brand.Add(key.Value.Trim());
        }

        foreach (var key in key4)
        {
            type.Add(key.Value.Trim());
        }

        foreach (var key in key5)
        {
            soort.Add(key.Value.Trim());
        }

        foreach (var key in key6)
        {
            naam.Add(key.Value.Trim());
        }


        foreach (var Name in naam)
        {
            if (textBox3.Text.ToString() == Name.ToString())
            {
                PDFLocation = file[i].ToString();
                pictureBox1.Image = pdfhandler.GetPDFthumbNail(PDFLocation);
                textBox4.Text =
                                title[i].ToString() + "\r\n" +
                                brand[i].ToString() + "\r\n" +
                                type[i].ToString() + "\r\n" +
                                soort[i].ToString() + "\r\n" +
                                textBox3.Text + "\r\n";
            }
            i++;
        }

]

I think this is not the best way to do it, but cant see a better way....