C# XML file already in use. Why? [duplicate]

This question already has an answer here:

• File being used by another process after using File.Create() 8 answers

Hello i am keep getting error after i run my program a window pop up and says the xml file (witch i created) is already in use and cant be accessed. I am creating Xml files for very first time and i think i am missing something but cant really find what. Can you help me ?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;

namespace phonebookFinal
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        List<Person> people = new List<Person>();
        private void Form1_Load(object sender, EventArgs e)
        {
            string path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
            if (!Directory.Exists(path + "\\PhoneBook "))
                Directory.CreateDirectory(path + "\\PhoneBook ");
            if (!Directory.Exists(path + "\\PhoneBook \\settings.xml"))
            {
                File.Create(path + "\\PhoneBook \\settings.xml");
                XmlTextWriter xW = new XmlTextWriter(path + "\\PhoneBook \\settings.xml", Encoding.UTF8);
                xW.WriteStartElement("people");
                xW.WriteEndElement();

            }
        }

        class Person
        {
            public string Name { get; set; }
            public string Email { get; set; }
            public string PhoneNumber { get; set; }
            public string MoreInformation { get; set; }
            public DateTime BirthDay { get; set; }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Person p = new Person();
            p.Name = textBox1.Text;
            p.Email = textBox2.Text;
            p.PhoneNumber = textBox3.Text;
            p.MoreInformation = textBox4.Text;
            p.BirthDay = dateTimePicker1.Value;
            people.Add(p);
            listView1.Items.Add(p.Name);
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
            textBox4.Text = "";
            dateTimePicker1.Value = DateTime.Now;
        }

        private void listView1_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                textBox1.Text = people[listView1.SelectedItems[0].Index].Name;
                textBox2.Text = people[listView1.SelectedItems[0].Index].Email;
                textBox3.Text = people[listView1.SelectedItems[0].Index].PhoneNumber;
                textBox4.Text = people[listView1.SelectedItems[0].Index].MoreInformation;
                dateTimePicker1.Value = people[listView1.SelectedItems[0].Index].BirthDay;
            }
            catch { }
        }
        void Remove()
        {
            try
            {
                listView1.Items.Remove(listView1.SelectedItems[0]);
                people.RemoveAt(listView1.SelectedItems[0].Index);
            }
            catch { }
        }
        private void button3_Click(object sender, EventArgs e)
        {
            Remove();
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
            textBox4.Text = "";
            dateTimePicker1.Value = DateTime.Now;
        }

        private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Remove();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            people[listView1.SelectedItems[0].Index].Name = textBox1.Text;
            people[listView1.SelectedItems[0].Index].Email = textBox2.Text;
            people[listView1.SelectedItems[0].Index].PhoneNumber = textBox3.Text;
            people[listView1.SelectedItems[0].Index].MoreInformation = textBox4.Text;
            people[listView1.SelectedItems[0].Index].BirthDay = dateTimePicker1.Value;
            listView1.SelectedItems[0].Text = textBox1.Text;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            XmlDocument xDoc = new XmlDocument();
            string path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
            xDoc.Load(path + "\\PhoneBook \\settings.xml");
            XmlNode xNode = xDoc.SelectSingleNode("people");
            xNode.RemoveAll();
            foreach (Person p in people)
            {
                XmlNode xTop = xDoc.CreateElement("Person");
                XmlNode xName = xDoc.CreateElement("Name");
                XmlNode xEmail = xDoc.CreateElement("Email");
                XmlNode xPhoneNumber = xDoc.CreateElement("PhoneNumber");
                XmlNode xMoreInformation = xDoc.CreateElement("MoreInformation");
                XmlNode xBirthDay = xDoc.CreateElement("BirthDay");
                xName.InnerText = p.Name;
                xEmail.InnerText = p.Email;
                xPhoneNumber.InnerText = p.PhoneNumber;
                xMoreInformation.InnerText = p.MoreInformation;
                xBirthDay.InnerText = p.BirthDay.ToFileTime().ToString();
                xTop.AppendChild(xName);
                xTop.AppendChild(xEmail);
                xTop.AppendChild(xPhoneNumber);
                xTop.AppendChild(xMoreInformation);
                xTop.AppendChild(xBirthDay);
                xDoc.DocumentElement.AppendChild(xTop);
            }
            xDoc.Save(path + "\\PhoneBook \\settings.xml");

        }
    }
}