Pascal VOC to Yolo txt converter in C#

Program.cs

using System.Globalization;
using System.Text;
using System.Xml.Serialization;

string annotationdir = @"D:\Work\Datasets\AnnotationsXML\001plate";
string imagedir = @"D:\Work\Datasets\Images\001plate";

string[] annotations = Directory.GetFiles(annotationdir);
string[] images = Directory.GetFiles(imagedir);

var culture = CultureInfo.GetCultureInfo("en-US");
CultureInfo.CurrentCulture = culture;

foreach(var annotation in annotations)
{
	string data = File.ReadAllText(annotation);
	Annotation d = (Annotation)XmlDeserializeFromString<Annotation>(data);
	StringBuilder sb = new StringBuilder();
	foreach(var obj in d.Object)
    {
		var x_coord = (obj.Bndbox.Xmin + obj.Bndbox.Xmax) / 2 / d.Size.Width;
		var y_coord = (obj.Bndbox.Ymin + obj.Bndbox.Ymax) / 2 / d.Size.Height;
		var shape_width = (obj.Bndbox.Xmax - obj.Bndbox.Xmin) / d.Size.Width;
		var shape_height = (obj.Bndbox.Ymax - obj.Bndbox.Ymin) / d.Size.Height;
		sb.AppendLine($"1 {x_coord.ToString("N7")} {y_coord.ToString("N7")} {shape_width.ToString("N7")} {shape_height.ToString("N7")}");
    }
	string filename = Path.GetFileNameWithoutExtension(d.Filename) + ".txt";
	File.WriteAllText(Path.Combine(imagedir, filename), sb.ToString());
}

static object XmlDeserializeFromString<T>(string objectData)
{
    var serializer = new XmlSerializer(typeof(T));
    object result;

    using (TextReader reader = new StringReader(objectData))
    {
        result = serializer.Deserialize(reader);
    }

    return result;
}

[XmlRoot(ElementName = "source")]
public class Source
{
	[XmlElement(ElementName = "database")]
	public string Database { get; set; }
}

[XmlRoot(ElementName = "size")]
public class Size
{
	[XmlElement(ElementName = "width")]
	public float Width { get; set; }
	[XmlElement(ElementName = "height")]
	public float Height { get; set; }
	[XmlElement(ElementName = "depth")]
	public int Depth { get; set; }
}

[XmlRoot(ElementName = "bndbox")]
public class Bndbox
{
	[XmlElement(ElementName = "xmin")]
	public float Xmin { get; set; }
	[XmlElement(ElementName = "ymin")]
	public float Ymin { get; set; }
	[XmlElement(ElementName = "xmax")]
	public float Xmax { get; set; }
	[XmlElement(ElementName = "ymax")]
	public float Ymax { get; set; }
}

[XmlRoot(ElementName = "object")]
public class Object
{
	[XmlElement(ElementName = "name")]
	public string Name { get; set; }
	[XmlElement(ElementName = "pose")]
	public string Pose { get; set; }
	[XmlElement(ElementName = "truncated")]
	public string Truncated { get; set; }
	[XmlElement(ElementName = "difficult")]
	public string Difficult { get; set; }
	[XmlElement(ElementName = "bndbox")]
	public Bndbox Bndbox { get; set; }
}

[XmlRoot(ElementName = "annotation")]
public class Annotation
{
	[XmlElement(ElementName = "folder")]
	public string Folder { get; set; }
	[XmlElement(ElementName = "filename")]
	public string Filename { get; set; }
	[XmlElement(ElementName = "path")]
	public string Path { get; set; }
	[XmlElement(ElementName = "source")]
	public Source Source { get; set; }
	[XmlElement(ElementName = "size")]
	public Size Size { get; set; }
	[XmlElement(ElementName = "segmented")]
	public string Segmented { get; set; }
	[XmlElement(ElementName = "object")]
	public List<Object> Object { get; set; }
}