用程序来自定义Performance Counter

To create a new category and set of performance counters programmatically：

代码

//  Create a collection of type CounterCreationData
var collection  =   new  CounterCreationDataCollection();
//  Create the counter and set its properties.
var data  =   new  CounterCreationData( " Number Of Items " ,  " ... " , PerformanceCounterType.NumberOfItems32);
//  Add counter to the collection.
collection.Add(data);
//  Create the category and pass the collection to it.
PerformanceCounterCategory.Create(
     " DimecastDeme " ,
     "" ,
    PerformanceCounterCategoryType.MultiInstance,
    collection);
//  Get the counter already been created (Counter Name: Number of Items; Category: DimecastDeme)
var counter  =   new  PerformanceCounter( " DimecastDeme " ,  " Number Of Items " ,  " Demo " ,  false );
//  set value
counter.RawValue  =   1 ;
counter.IncrementBy( 2 );
counter.IncrementBy( 4 );

Reference:
http://msdn.microsoft.com/en-us/library/5e3s61wf.aspx
http://www.techscreencast.com/language/dotnet/how-to-create-a-custom-performance-counter/1856