Dim myCategoryName As String
Dim numberOfCounters As Integer
Console.Write("Enter the category Name : ")
myCategoryName = Console.ReadLine()
' Check if the category already exists or not.
If Not PerformanceCounterCategory.Exists(myCategoryName) Then
    Console.Write("Enter the number of counters : ")
    numberOfCounters = Integer.Parse(Console.ReadLine())
    Dim myCounterCreationData(numberOfCounters - 1) As CounterCreationData

    Dim i As Integer
    For i = 0 To numberOfCounters - 1
        Console.Write("Enter the counter name for {0} counter ", i)
        myCounterCreationData(i) = New CounterCreationData()
        myCounterCreationData(i).CounterName = Console.ReadLine()
    Next i
    Dim myCounterCollection As New CounterCreationDataCollection(myCounterCreationData)
    Dim myInsertCounterCreationData As New CounterCreationData("CounterInsert", "", _
                            PerformanceCounterType.NumberOfItems32)
    ' Insert an instance of 'CounterCreationData' in the 'CounterCreationDataCollection'.
    myCounterCollection.Insert(myCounterCollection.Count - 1, myInsertCounterCreationData)
    Console.WriteLine("'{0}' counter is inserted into 'CounterCreationDataCollection'", _
                            myInsertCounterCreationData.CounterName)
    ' Create the category.
    PerformanceCounterCategory.Create(myCategoryName, "Sample Category", _
       PerformanceCounterCategoryType.SingleInstance, myCounterCollection)

    For i = 0 To numberOfCounters - 1
        myCounter = New PerformanceCounter(myCategoryName, _
                                         myCounterCreationData(i).CounterName, "", False)
    Next i
    Console.WriteLine("The index of '{0}' counter is {1}", _
       myInsertCounterCreationData.CounterName, myCounterCollection.IndexOf(myInsertCounterCreationData))
Else
    Console.WriteLine("The category already exists")
End If