PerformanceCounterCategory.Create Method (String, String, CounterCreationDataCollection)


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Note: This API is now obsolete.

Registers the custom performance counter category containing the specified counters on the local computer.

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

[ObsoleteAttribute("This method has been deprecated.  Please use System.Diagnostics.PerformanceCounterCategory.Create(string categoryName, string categoryHelp, PerformanceCounterCategoryType categoryType, CounterCreationDataCollection counterData) instead.")]
public static PerformanceCounterCategory Create(
	string categoryName,
	string categoryHelp,
	CounterCreationDataCollection counterData


Type: System.String

The name of the custom performance counter category to create and register with the system.

Type: System.String

A description of the custom category.

Type: System.Diagnostics.CounterCreationDataCollection

A CounterCreationDataCollection that specifies the counters to create as part of the new category.

Return Value

Type: System.Diagnostics.PerformanceCounterCategory

A PerformanceCounterCategory that is associated with the new custom category, or performance object.

Exception Condition

A counter name that is specified within the counterData collection is null or an empty string ("").


A counter that is specified within the counterData collection already exists.


The counterName parameter has invalid syntax. It might contain backslash characters ("\") or have length greater than 80 characters.


The categoryName parameter is null.


The category already exists on the local computer.


The layout of the counterData collection is incorrect for base counters. A counter of type AverageCount64, AverageTimer32, CounterMultiTimer, CounterMultiTimerInverse, CounterMultiTimer100Ns, CounterMultiTimer100NsInverse, RawFraction, SampleFraction or SampleCounter has to be immediately followed by one of the base counter types (AverageBase, MultiBase, RawBase, or SampleBase).


A call to an underlying system API failed.


Code that is executing without administrative privileges attempted to read a performance counter.


To read performance counters in Windows Vista and later, Windows XP Professional x64 Edition, or Windows Server 2003, you must either be a member of the Performance Monitor Users group or have administrative privileges.

To avoid having to elevate your privileges to access performance counters in Windows Vista and later, add yourself to the Performance Monitor Users group.

In Windows Vista and later, User Account Control (UAC) determines the privileges of a user. If you are a member of the Built-in Administrators group, you are assigned two run-time access tokens: a standard user access token and an administrator access token. By default, you are in the standard user role. To execute the code that accesses performance counters, you must first elevate your privileges from standard user to administrator. You can do this when you start an application by right-clicking the application icon and indicating that you want to run as an administrator.

The following code example determines whether a PerformanceCounterCategory object named "orders" exists. If not, it creates the PerformanceCounterCategory object by using a CounterCreationDataCollection object that contains two performance counters.

if (!PerformanceCounterCategory.Exists("Orders"))
    CounterCreationData milk = new CounterCreationData();
    milk.CounterName = "milk";
    milk.CounterType = PerformanceCounterType.NumberOfItems32;

    CounterCreationData milkPerSecond = new CounterCreationData();
    milkPerSecond.CounterName = "milk orders/second";
    milkPerSecond.CounterType = PerformanceCounterType.RateOfCountsPerSecond32;

    CounterCreationDataCollection ccds = new CounterCreationDataCollection();

    PerformanceCounterCategory.Create("Orders", "Number of processed orders",
        PerformanceCounterCategoryType.SingleInstance, ccds);



for performing administrative tasks on performance counter categories. Associated enumeration: PerformanceCounterPermissionAccess.Administer.

.NET Framework
Available since 1.1
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