mysql数据库连接未释放怎么解决

sqlhelper有自动关闭的，但是在mysql中怎么监视

比如说总共有五个连接，如果连接数大于5就是未释放的
但是这个统计连接数 我怎么看呢

using System;
using System.Collections.Generic;
using System.Text;
using MySql.Data.MySqlClient;
using System.Web;
using System.Configuration;

namespace csBll
{
public class MySqlConn
{
public MySqlConn()
{

}
private string database = string.Empty;
public MySqlConn(string databaseName)
{
this.database = databaseName;
}

public MySqlConnection CreateConn()
{
string connStr = HttpContext.Current.Server.MapPath(ConfigurationSettings.AppSettings["mysqlStr"]);
string[] connStrs = connStr.Split('\\');
string connString = connStrs[connStrs.Length - 1].Replace("meetme",database);
MySqlConnection myConn = new MySqlConnection(connString);
return myConn;
}

public bool ExecSQL(string sqlStr)
{
MySqlConnection myConn = CreateConn();
myConn.Open();
MySqlCommand cmd = myConn.CreateCommand();
cmd.CommandText = sqlStr;
if (cmd.ExecuteNonQuery() > 0)
{
myConn.Close();
return true;
}
else
{
myConn.Close();
return false;
}
}

public MySqlDataReader ReturnDataSet(string sqlStr)
{
MySqlConnection myConn = CreateConn();
myConn.Open();
MySqlCommand cmd = myConn.CreateCommand();
cmd.CommandText = sqlStr;

MySqlDataReader rd = cmd.ExecuteReader();

//myConn.Close()-------这个注释了影响吗
return rd;
}

public System.Data.DataSet ExecuteDataSet(string p)
{
throw new Exception("The method or operation is not implemented.");
}
}
}