C write TXT file

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for(int i=0;i<10;i++)
{
    
    FileStream stream= File.Create("d:\\"+i+".txt");
       StreamWriter write = new StreamWriter(stream);
       write.Write("aaaa");
       write.Close();
       write.Dispose();
}

private void button3_Click(object sender, EventArgs e)
        {
    
            if (wenpath != null && wenpath != "")
            {
    
                string qunp;
                db b = new db();
                // Create connection string 
                string path = wenpath;

                //string databaseFileName = "C:/QQ.db";
                //string connectionString = "data source = " + databaseFileName;
                // Linked database 
                //SQLiteConnection dbConnection = new SQLiteConnection(connectionString);
                // Open database 
                //dbConnection.Open();
                //sql sentence 
                string sql = "select name from sqlite_master where type='table' order by name;";
                // load sql
                SQLiteCommand cd = new SQLiteCommand(sql, b.lian(path));
                // perform 
                SQLiteDataReader dr = cd.ExecuteReader();
                //
                // Query all table names 
                while (dr.Read())// Read 
                {
    
                    try
                    {
    
                        //Console.Write(dr["name"]+"\n");
                        string str = dr["name"].ToString();
                        if (str.Length > 12)// Filter less than 9 Table name of , Because the table names of user messages and group messages are greater than 9
                        {
    
                            qunp = str.Substring(0, 12);
                            string pan = str.Substring(0, 9);
                            //Console.Write(pan + "\n" + " I am a ");
                            if (pan == "tb_c2cMsg")
                            {
    // Determine whether it is a user message or a group message 
                                string pp = str;
                                //string str1 = dr["name"].ToString();
                                //string pan1 = str1.Substring(0, 9);
                                //Console.Write(str + "\n");
                                string sqls = "select * from '" + str + "';";
                                // load sql
                                SQLiteCommand cds = new SQLiteCommand(sqls, b.lian(path));
                                // perform 
                                SQLiteDataReader drs = cds.ExecuteReader();
                                if (drs.Read())// Read 
                                {
    
                                    string count;
                                    string sqlc = "select count(*) as num from '" + str + "';";// Get the number of messages 
                                    // load sql
                                    SQLiteCommand cdsc = new SQLiteCommand(sqlc, b.lian(path));
                                    // perform 
                                    SQLiteDataReader drc = cdsc.ExecuteReader();
                                    if (drc.Read())
                                    {
    
                                        count = drc["num"].ToString();
                                        //Console.Write(count+"\n");
                                    }
                                    //Console.Write(drs["uin"]);
                                    DateTime d = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));// Turn the timestamp to mm / DD / yyyy 
                                    long t = long.Parse(drs["time"] + "0000000");
                                    TimeSpan to = new TimeSpan(t);
                                    //Console.Write(d.Add(to) + "\n");
                                    var time6 = d.Add(to);
                                    ListViewItem lt = new ListViewItem();
                                    // Convert database data into ListView A row of data of type 
                                    lt.Text = drs["uin"].ToString();
                                    lt.SubItems.Add(time6.ToString());
                                    lt.SubItems.Add(drc["num"].ToString());
                                    // take lt Data added to listView1 Control 
                                    listView1.Items.Add(lt);
                                }
                            }
                            else if (qunp == "tb_TroopMsg_" && str.Length > 16)// The filter table name starts with troopm But less than 12 Characters , Because this is not a table with content 
                            {
    // It's a group message 
                                //if (str.Length > 16 && qunp == "tb_TroopMsg_")
                                //{
    
                                string qun;
                                try
                                {
    
                                    Console.Write(str + ".." + str.Length + "\n");
                                    //string pan1 = str.Substring(9, 12);
                                    qun = str.Substring(12);
                                    Console.Write(qun + "\n");
                                }
                                catch (Exception e2)
                                {
    
                                    Console.Write(e2 + " Group Fault ");
                                }
                                //}
                                string pp = str.Substring(0, 12);

                                if (pp == "tb_TroopMsg_" && str.Length > 12)
                                {
    
                                    //string pan1 = str.Substring(0, str.Length);
                                    //Console.Write(pan1 + "\n"+str.Length+"\n");
                                    //string qun = str.Substring(4, str.Length);
                                    //Console.Write(str+"\n");
                                    string sqls = "select * from '" + str + "';";
                                    // load sql
                                    SQLiteCommand cds = new SQLiteCommand(sqls, b.lian(path));
                                    // perform 
                                    SQLiteDataReader drs = cds.ExecuteReader();
                                    if (drs.Read())// Read 
                                    {
    
                                        string count;
                                        string sqlc = "select count(*) as num from '" + str + "';";// Get the number of messages 
                                        // load sql
                                        SQLiteCommand cdsc = new SQLiteCommand(sqlc, b.lian(path));
                                        // perform 
                                        SQLiteDataReader drc = cdsc.ExecuteReader();
                                        if (drc.Read())
                                        {
    
                                            count = drc["num"].ToString();
                                            //Console.Write(count+"\n");
                                        }
                                        //Console.Write(drs["uin"]);
                                        DateTime d = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));// Turn the timestamp to mm / DD / yyyy 
                                        long t = long.Parse(drs["MsgTime"] + "0000000");
                                        TimeSpan to = new TimeSpan(t);
                                        //Console.Write(d.Add(to) + "\n");
                                        var time6 = d.Add(to);
                                        ListViewItem lt = new ListViewItem();
                                        // Convert database data into ListView A row of data of type 
                                        lt.Text = " Group " + str.Substring(12);
                                        lt.SubItems.Add(time6.ToString());
                                        lt.SubItems.Add(drc["num"].ToString());
                                        // take lt Data added to listView1 Control 
                                        listView1.Items.Add(lt);
                                    }
                                }
                                //string str1 = dr["name"].ToString();
                                //string pan1 = str1.Substring(0, 9);
                                //Console.Write(str + "\n");
                                // pan1 = pp.Substring(0, pp.Length);
                                //Console.Write(pan1+"\n");
                            }
                            else
                            {
    
                                Console.Write(str + " Group mismatch ");
                            }
                        }
                        else
                        {
    
                            Console.Write(str + " User messages do not match ");
                        }
                    }
                    catch (Exception e1)
                    {
    
                        Console.Write(e1 + " The following error ");
                    }
                }

            }
            else
            {
    
                MessageBox.Show(" I haven't chosen the corresponding QQ.db file ");
            }
        }