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CounterCreationData Class

Defines the counter type, name, and Help string for a custom counter.


Namespace:  System.Diagnostics
Assembly:  System (in System.dll)

[TypeConverterAttribute("System.Diagnostics.Design.CounterCreationDataConverter, System.Design, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
public class CounterCreationData

The CounterCreationData type exposes the following members.

Public methodCounterCreationData()Initializes a new instance of the CounterCreationData class, to a counter of type NumberOfItems32, and with empty name and help strings.
Public methodCounterCreationData(String, String, PerformanceCounterType)Initializes a new instance of the CounterCreationData class, to a counter of the specified type, using the specified counter name and Help strings.

Public propertyCounterHelpGets or sets the custom counter's description.
Public propertyCounterNameGets or sets the name of the custom counter.
Public propertyCounterTypeGets or sets the performance counter type of the custom counter.

Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

The following code example demonstrates how to use the CounterCreationData class to define custom counters. This example creates counters that display how many items are processed in an operation. The example initializes the counters, collects information from them, and then calculates and displays the results to the console.

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Diagnostics;

public class App {

	private static PerformanceCounter avgCounter64Sample;
	private static PerformanceCounter avgCounter64SampleBase;

	public static void Main()
		ArrayList samplesList = new ArrayList();

        // If the category does not exist, create the category and exit.
        // Performance counters should not be created and immediately used.
        // There is a latency time to enable the counters, they should be created
        // prior to executing the application that uses the counters.
        // Execute this sample a second time to use the category.
        if (SetupCategory())


	private static bool SetupCategory()
		if ( !PerformanceCounterCategory.Exists("AverageCounter64SampleCategory") ) 

			CounterCreationDataCollection counterDataCollection = new CounterCreationDataCollection();
			// Add the counter.
			CounterCreationData averageCount64 = new CounterCreationData();
			averageCount64.CounterType = PerformanceCounterType.AverageCount64;
			averageCount64.CounterName = "AverageCounter64Sample";
	        // Add the base counter.
			CounterCreationData averageCount64Base = new CounterCreationData();
			averageCount64Base.CounterType = PerformanceCounterType.AverageBase;
			averageCount64Base.CounterName = "AverageCounter64SampleBase";

			// Create the category.
                "Demonstrates usage of the AverageCounter64 performance counter type.",
                PerformanceCounterCategoryType.SingleInstance, counterDataCollection);
			Console.WriteLine("Category exists - AverageCounter64SampleCategory");
	private static void CreateCounters()
		// Create the counters.

		avgCounter64Sample = new PerformanceCounter("AverageCounter64SampleCategory", 

		avgCounter64SampleBase = new PerformanceCounter("AverageCounter64SampleCategory", 
	private static void CollectSamples(ArrayList samplesList)
		Random r = new Random( DateTime.Now.Millisecond );

		// Loop for the samples.
		for (int j = 0; j < 100; j++) 
			int value = r.Next(1, 10);
			Console.Write(j + " = " + value);



			if ((j % 10) == 9) 
				samplesList.Add( avgCounter64Sample.NextSample() );

	private static void CalculateResults(ArrayList samplesList)
		for(int i = 0; i < (samplesList.Count - 1); i++)
			// Output the sample.
			OutputSample( (CounterSample)samplesList[i] );
			OutputSample( (CounterSample)samplesList[i+1] );

			// Use .NET to calculate the counter value.
			Console.WriteLine(".NET computed counter value = " +
				(CounterSample)samplesList[i+1]) );

			// Calculate the counter value manually.
			Console.WriteLine("My computed counter value = " + 
				(CounterSample)samplesList[i+1]) );

	//	Description - This counter type shows how many items are processed, on average,
	//		during an operation. Counters of this type display a ratio of the items 
	//		processed (such as bytes sent) to the number of operations completed. The  
	//		ratio is calculated by comparing the number of items processed during the 
	//		last interval to the number of operations completed during the last interval. 
	// Generic type - Average
	//  	Formula - (N1 - N0) / (D1 - D0), where the numerator (N) represents the number 
	//		of items processed during the last sample interval and the denominator (D) 
	//		represents the number of operations completed during the last two sample 
	//		intervals. 
	//	Average (Nx - N0) / (Dx - D0)  
	//	Example PhysicalDisk\ Avg. Disk Bytes/Transfer 
	private static Single MyComputeCounterValue(CounterSample s0, CounterSample s1)
		Single numerator = (Single)s1.RawValue - (Single)s0.RawValue;
		Single denomenator = (Single)s1.BaseValue - (Single)s0.BaseValue;
		Single counterValue = numerator / denomenator;
	// Output information about the counter sample.
	private static void OutputSample(CounterSample s)
		Console.WriteLine("Sample values - \r\n");
		Console.WriteLine("   BaseValue        = " + s.BaseValue);
		Console.WriteLine("   CounterFrequency = " + s.CounterFrequency);
		Console.WriteLine("   CounterTimeStamp = " + s.CounterTimeStamp);
		Console.WriteLine("   CounterType      = " + s.CounterType);
		Console.WriteLine("   RawValue         = " + s.RawValue);
		Console.WriteLine("   SystemFrequency  = " + s.SystemFrequency);
		Console.WriteLine("   TimeStamp        = " + s.TimeStamp);
		Console.WriteLine("   TimeStamp100nSec = " + s.TimeStamp100nSec);

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.