XML string/array Comparison

I'm trying to match the indexes from "filename" and "filesize" with the ones from "xml". They contain filesize and names. I need to match them up 开发者_JS百科in an if statment. I'm stuck though, and have no idea how to proceed.

    public static void APB()
    {
        ArrayList filename = new ArrayList();
        ArrayList filesize = new ArrayList();
        var directory = new DirectoryInfo(Directory.GetCurrentDirectory());
        var files= directory.GetFiles("*", SearchOption.AllDirectories);
        long fnd = 0;
        foreach (var file in files)
        {
            filename.Add(file.FullName);
            filesize.Add(fnd += file.Length);
        }

        ArrayList xml = new ArrayList();
        XmlTextReader reader = new XmlTextReader(dictonary.launcher);
        while (reader.Read())
        {
            switch (reader.NodeType)
            {
                case XmlNodeType.Element:
                    xml.Add(reader.Name);
                    while (reader.MoveToNextAttribute())
                    xml.Add(reader.Name + "=" + reader.Value);
                    break;
            }
        }
    }

Create anonymous types for each with the name and size and compare them.