You can create an override for a property or configuration parameter for a rule. A property override changes the default value of a rule property, and a configuration override changes the default value of a custom configuration setting for a rule. If you want to create an override for a rule, use the Microsoft.EnterpriseManagement.Configuration.ManagementPackRulePropertyOverride or Microsoft.EnterpriseManagement.Configuration.ManagementPackRuleConfigurationOverride class. These classes are derived from the Microsoft.EnterpriseManagement.Configuration.ManagementPackRuleOverride class.

Only the Enabled property can be overridden for rules. To figure out which parameters can be overridden, you must look at the definition of the rule in the Management Pack that defines the rule. All the parameters that can be overridden are defined in the OverrideableParameters element of the rule. You can also call the GetOverrideableParameters method to get the list of parameters programmatically.

The following example creates an override for the Enabled property of a rule.

Visual Basic  Copy Code 
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.EnterpriseManagement
Imports Microsoft.EnterpriseManagement.Administration
Imports Microsoft.EnterpriseManagement.Common
Imports Microsoft.EnterpriseManagement.Configuration
Imports Microsoft.EnterpriseManagement.Monitoring


Namespace SDKSamples
	Class Program
		Public Overloads Shared Function Main(ByVal args() As String) As Integer

			Dim mg As ManagementGroup
			Dim mp As ManagementPack
			Dim monitoringClass As MonitoringClass
			Dim classCriteria As MonitoringClassCriteria
			Dim ruleCriteria As MonitoringRuleCriteria
			Dim rule As MonitoringRule
			Dim ruleOverride As ManagementPackRulePropertyOverride

			mg = New ManagementGroup("localhost")

			mp = mg.GetManagementPacks("OverrideTestMP")(0)

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

			monitoringClass = mg.GetMonitoringClasses(classCriteria)(0)

			ruleCriteria = New MonitoringRuleCriteria("DisplayName='Collect Database Free Space (%)'")

			rule = monitoringClass.GetMonitoringRules(ruleCriteria)(0)

			ruleOverride = New ManagementPackRulePropertyOverride(mp, "SampleRuleOverride")

			ruleOverride.Rule = rule
			ruleOverride.Property = ManagementPackWorkflowProperty.Enabled
			ruleOverride.Value = "false"
			ruleOverride.Context = monitoringClass
			ruleOverride.DisplayName = "SampleRuleOverride"

			mp.Verify()

			' Save the changes into the management pack.
			mp.AcceptChanges()

		End Function
	End Class
End Namespace
C#  Copy Code 
using 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;
			MonitoringRuleCriteria			ruleCriteria;
			MonitoringRule					rule;
			ManagementPackRulePropertyOverride  ruleOverride;

			mg = new ManagementGroup("localhost");

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

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

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

			ruleCriteria = new MonitoringRuleCriteria("DisplayName='Collect Database Free Space (%)'");

			rule = monitoringClass.GetMonitoringRules(ruleCriteria)[0];

			ruleOverride = new ManagementPackRulePropertyOverride(mp, "SampleRuleOverride");

			ruleOverride.Rule		 = rule;
			ruleOverride.Property	 = ManagementPackWorkflowProperty.Enabled;
			ruleOverride.Value		= "false";
			ruleOverride.Context		= monitoringClass;
			ruleOverride.DisplayName	= "SampleRuleOverride";

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