MySQL data insertion efficiency comparison

public class MySqlInstance
  {
    //Connection string private static string mySqlConnectionStr = "Server = localhost; Database = test; Uid = root; Pwd = password.1;";
    private static MySqlConnection _mysqlConnect;
    private static MySqlConnection mysqlConnect
    {
      get
      {
        if (null == _mysqlConnect)
        {
          _mysqlConnect = new MySqlConnection(mySqlConnectionStr);
        }
        return _mysqlConnect;
      }
    }
    private static MySqlCommand _mysqlCommand;
    private static MySqlCommand mysqlCommand
    {
      get
      {
        if (null == _mysqlCommand)
        {
          _mysqlCommand = mysqlConnect.CreateCommand();
        }
        return _mysqlCommand;
      }
    }
    //Open the connection public static void OpenConnect()
    {
      mysqlConnect.Open();
    }
    //Close the connection public static void CloseConnect()
    {
      mysqlConnect.Close();
    }
    public static MySqlConnection Connection
    {
      get
      {
        return mysqlConnect;
      }
    }
    //Insert data in an anti-injection way //Use transaction 10000 to insert, and commit the transaction once at the end public static int InsertData(string Command, List<MySqlParameter> Params)
    {
      //Program time monitoring Stopwatch sw = new Stopwatch();
      //Program timing startssw.Start();
      OpenConnect();
      //Transaction start MySqlTransaction trans = mysqlConnect.BeginTransaction();
      mysqlCommand.CommandText = Command;
      mysqlCommand.Parameters.AddRange(Params.ToArray());
      int count = 0;
      for (int i = 0; i < 10000; i++)
      {
        if (mysqlCommand.ExecuteNonQuery() > 0)
          count++;
      }
      //Transaction commit trans.Commit();
      CloseConnect();
      mysqlCommand.Parameters.Clear();
      //Timer stops sw.Stop();
      TimeSpan ts2 = sw.Elapsed;
      Console.WriteLine(ts2.TotalMilliseconds);
      return count;
    }
    //The query results in MySqlDataReader. You cannot close the connection if you want to use it. public static MySqlDataReader SelectData(string sql)
    {
      Stopwatch sw = new Stopwatch();
      sw.Start();
      // OpenConnect();
      MySqlCommand newcommond = new MySqlCommand(sql, mysqlConnect);
      MySqlDataReader data = newcommond.ExecuteReader();
      // CloseConnect();
      sw.Stop();
      TimeSpan ts2 = sw.Elapsed;
      Console.WriteLine(ts2.TotalMilliseconds);
      return data;
    }
    /// <summary>
    /// The query results in a data set/// </summary>
    /// <param name="sql"></param>
    /// <returns></returns>
    public static DataSet SelectDataSet(string sql)
    {
      MySqlCommand newcommond = new MySqlCommand(sql, mysqlConnect);
      MySqlDataAdapter adapter = new MySqlDataAdapter();
      adapter.SelectCommand = newcommond;
      DataSet ds = new DataSet();
      adapter.Fill(ds);
      return ds;
    }
    //Unsafe insert with injection public static int InsertDataSql(string sql)
    {
      // OpenConnect();
      mysqlCommand.CommandText = sql;
      int count = mysqlCommand.ExecuteNonQuery();
      // CloseConnect();
      return count;
    }
    //Safely insert parameters using @
    //Insert 10,000 times without using transactions public static int InsertDataNoTran(string Command, List<MySqlParameter> Params)
    {
      Stopwatch sw = new Stopwatch();
      sw.Start();
      OpenConnect();
      mysqlCommand.CommandText = Command;
      mysqlCommand.Parameters.AddRange(Params.ToArray());
      int count = 0;
      for (int i = 0; i < 10000; i++)
      {
        if (mysqlCommand.ExecuteNonQuery() > 0)
          count++;
      }
      CloseConnect();
      mysqlCommand.Parameters.Clear();
      sw.Stop();
      TimeSpan ts2 = sw.Elapsed;
      Console.WriteLine(ts2.TotalMilliseconds);
      return count;
    }
    //Spell 10,000 insert statements at once and submit them at once public static void test4()
    {
      Stopwatch sw = new Stopwatch();
      sw.Start();
      MySqlInstance.OpenConnect();
      MySqlTransaction tran = MySqlInstance.Connection.BeginTransaction();
      string command = string.Empty;
      for (int i = 0; i < 10000; i++)
      {
        string temp = string.Format("insert into test.testtable(pname,pwd) value ('{0}','{1}'); \r\n", "name" + i, "password." + i);
        command += temp;
      }
      MySqlInstance.InsertDataSql(command);
      tran.Commit();
      MySqlInstance.CloseConnect();
      sw.Stop();
      TimeSpan ts2 = sw.Elapsed;
      Console.WriteLine(ts2.TotalMilliseconds);
    }
 }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data;
using MySql.Web;
using MySql.Data.MySqlClient;
using System.Diagnostics;
using System.Data;
namespace mysqlDEMO01
{
  Class Program
  {
    static void Main(string[] args)
    {      
      testInsert();
      Console.ReadLine();
    }
    //Use @ to safely insert the anti-injection parameter.
    public static void testInsert()
    {
      List<MySqlParameter> lmp = new List<MySqlParameter>();
      lmp.Add(new MySqlParameter("@pname", "hello2"));
      lmp.Add(new MySqlParameter("@pwd", "1232"));
      string command = "insert into test.testtable(pname,pwd) value(@pname,@pwd); ";
      MySqlInstance.InsertData(command, lmp);
      List<MySqlParameter> lmp2 = new List<MySqlParameter>();
      lmp2.Add(new MySqlParameter("@pname", "hello2"));
      lmp2.Add(new MySqlParameter("@pwd", "1232"));
      MySqlInstance.InsertDataNoTran(command, lmp2);
      test4();
    }
   }
}