Необработанное исключение типа "system. unauthorizedaccessexception"

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Я следую учебнику по Подключение C# к MySQL[^]


По какой-то причине , когда я запускаю метод Backup (), я получаю эту ошибку: и я пытаюсь найти файл, но его там нет.

<pre lang="C#">An unhandled exception of type &#39;System.UnauthorizedAccessException&#39; occurred in mscorlib.dll

Additional information: Access to the path &#39;C:\MySqlBackup2016-11-4-8-23-4-270.sql&#39; is denied.</pre>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using MySql.Data.MySqlClient;

using System.Diagnostics;


using System.IO;



namespace connect
{

    class DBConnect
    {
        private MySqlConnection connection;
        private string server;
        private string database;
        private string uid;
        private string password;

        //Constructor
        public DBConnect()
        {
            Initialize();
        }

        //Initialize values
        private void Initialize()
        {
            server = "localhost";
            database = "first_db";
            uid = "root";
            password = "";
            string connectionString;
            connectionString = "SERVER=" + server + ";" + "DATABASE=" +
            database + ";" + "UID=" + uid + ";" + "PASSWORD=" + password + ";";

            connection = new MySqlConnection(connectionString);
        }

        //open connection to database
        public bool OpenConnection()
        {

            try
            {
                connection.Open();

                Console.WriteLine("connection opened");

                return true;
            }
            catch (MySqlException ex)
            {
                //When handling errors, you can your application's response based 
                //on the error number.
                //The two most common error numbers when connecting are as follows:
                //0: Cannot connect to server.
                //1045: Invalid user name and/or password.
                switch (ex.Number)
                {
                    case 0:
                        Console.WriteLine("Cannot connect to server.  Contact administrator");
                        break;

                    case 1045:
                        Console.WriteLine("Invalid username/password, please try again");
                        break;
                }
                return false;
            }



        }

        //Close connection
        public bool CloseConnection()
        {
            try
            {
                connection.Close();

                Console.WriteLine("connection closed");
                return true;
            }
            catch (MySqlException ex)
            {
                Console.WriteLine(ex.Message);
                return false;
            }



        }
        


        //Insert statement
        public void Insert()
        {

            string query = "INSERT INTO users (id, username, password) VALUES('23' ,'Jojo', '33')  , ('99', 'jen', '66')";

    //open connection
    if (this.OpenConnection() == true)
    {
        //create command and assign the query and connection from the constructor
        MySqlCommand cmd = new MySqlCommand(query, connection);

        Console.WriteLine("values inserted");


        
        //Execute command
        cmd.ExecuteNonQuery();

        //close connection
        this.CloseConnection();
    }

        }



        

        //Update statement
        public void Update()
        {

          string query = "UPDATE users SET username='Joe', password='22', id='33'  WHERE username='Joe'";

    //Open connection
    if (OpenConnection() == true)
    {
        //create mysql command
        MySqlCommand cmd = new MySqlCommand();
        //Assign the query using CommandText
        cmd.CommandText = query;
        //Assign the connection using Connection
        cmd.Connection = connection;

        //Execute query
        cmd.ExecuteNonQuery();

        //close connection
        this.CloseConnection();
    }



        }



        
        //Delete statement
        public void Delete()
        {

            string query = "DELETE FROM users WHERE username='Joe'";

            if (this.OpenConnection() == true)
            {
                MySqlCommand cmd = new MySqlCommand(query, connection);
                cmd.ExecuteNonQuery();
                this.CloseConnection();
            }


        }


       
        //Select statement
        public List<string>[] Select()
        {
            string query = "SELECT * FROM users";

    //Create a list to store the result
    List< string >[] list = new List< string >[3];
    list[0] = new List< string >();
    list[1] = new List< string >();
    list[2] = new List< string >();

    //Open connection
    if (this.OpenConnection() == true)
    {
        //Create Command
        MySqlCommand cmd = new MySqlCommand(query, connection);
        //Create a data reader and Execute the command
        MySqlDataReader dataReader = cmd.ExecuteReader();
        
        //Read the data and store them in the list
        while (dataReader.Read())
        {
            list[0].Add(dataReader["id"] + "");
            list[1].Add(dataReader["username"] + "");
            list[2].Add(dataReader["password"] + "");
        }

        //close Data Reader
        dataReader.Close();

        //close Connection
        this.CloseConnection();

        //return list to be displayed
        return list;
    }
    else
    {
        return list;
    }

        }



        //Count statement
        public int Count()
        {
             string query = "SELECT Count(*) FROM users";
    int Count = -1;

    //Open Connection
    if (this.OpenConnection() == true)
    {
        //Create Mysql Command
        MySqlCommand cmd = new MySqlCommand(query, connection);

        //ExecuteScalar will return one value
        Count = int.Parse(cmd.ExecuteScalar()+"");
        
        //close Connection
        this.CloseConnection();

        return Count;
    }
    else
    {
        return Count;
    }

        }



        //Backup
        public void Backup()
        {
             try
    {
        DateTime Time = DateTime.Now;
        int year = Time.Year;
        int month = Time.Month;
        int day = Time.Day;
        int hour = Time.Hour;
        int minute = Time.Minute;
        int second = Time.Second;
        int millisecond = Time.Millisecond;

        //Save file to C:\ with the current date as a filename
        string path;
        path = "C:\\MySqlBackup" + year + "-" + month + "-" + day + 
	"-" + hour + "-" + minute + "-" + second + "-" + millisecond + ".sql";
        StreamWriter file = new StreamWriter(path);

        
        ProcessStartInfo psi = new ProcessStartInfo();
        psi.FileName = "mysqldump";
        psi.RedirectStandardInput = false;
        psi.RedirectStandardOutput = true;
        psi.Arguments = string.Format(@"-u{0} -p{1} -h{2} {3}", 
			uid, password, server, database);
        psi.UseShellExecute = false;

        Process process = Process.Start(psi);

        string output;
        output = process.StandardOutput.ReadToEnd();
        file.WriteLine(output);
        process.WaitForExit();
        file.Close();
        process.Close();
    }
    catch (IOException ex)
    {
        Console.WriteLine("Error , unable to backup!");
    }



        }



        /*
        //Restore
        public void Restore()
        {
        }
         * 
          */
    }






}

Что я уже пробовал:

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