XMLに書き込む処理

XmlController.cs

public void SaveXml(List<Person> personList)
{
    System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(Person[])); 

    // Data.xmlは保存するファイル名

    using (System.IO.FileStream fs = new System.IO.FileStream("Data.xml", System.IO.FileMode.Create)) 
    {
        serializer.Serialize(fs, personList.ToArray());
    }
}