https://msdn.microsoft.com/en-us/library/bb960482.aspx

System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using Microsoft.EnterpriseManagement;
using Microsoft.EnterpriseManagement.Administration;
using Microsoft.EnterpriseManagement.Common;
using Microsoft.EnterpriseManagement.Configuration;
using Microsoft.EnterpriseManagement.Monitoring;

namespace SDKSamples
{
    class Program
    {
        //---------------------------------------------------------------------
        static void Main(string[] args)
        {
            ManagementGroup                         mg;
            ManagementPack                          mp;
            MonitoringClassCriteria                 classCriteria;
            MonitoringClass                         monitoringClass;
            MonitorCriteria                         monitorCriteria;
            ManagementPackMonitor                   monitor;
            ManagementPackMonitorPropertyOverride   monitorOverride;

            mg = new ManagementGroup("localhost");

            mp = mg.GetManagementPacks("OverrideTestMP")[0];

            classCriteria = new MonitoringClassCriteria("Name='Microsoft.SQLServer.2005.Database'");

            monitoringClass = mg.GetMonitoringClasses(classCriteria)[0];

            monitorCriteria = new MonitorCriteria("DisplayName='Database Status'");

            monitor = mg.GetMonitors(monitorCriteria)[0];

            monitorOverride = new ManagementPackMonitorPropertyOverride(mp, "SampleMonitorOverride");

            monitorOverride.Monitor     = monitor;
            monitorOverride.Property    = ManagementPackMonitorProperty.Enabled;
            monitorOverride.Value       = "false";
            monitorOverride.Context     = monitoringClass;
            monitorOverride.DisplayName = "SampleMonitorOverride";

            mp.Verify();
            
            //Save the changes into the management pack.
            mp.AcceptChanges();
        }        
    }

Why I can use monitoring class for create override? I founded managementpack without classes and i get error with this sample of code. Can I make override without classes if I can how?

Thanks