You are developing a method named CreateCounters that will create performance counters for an
application.

The method includes the following code. (Line numbers are included for reference only.)

You need to ensure that Counter1 is available for use in Windows Performance Monitor (PerfMon).
Which code segment should you insert at line 16?

A.
CounterType = PerformanccCounterType.RawBase

B.
CounterType = PerformanceCounterType.AverageBase

C.
CounterType = PerformanceCounterType.SampleBase

D.
CounterType = PerformanceCounterType.CounterMultiBase

Explanation:
PerformanceCounterType.SampleBase – A base counter that stores the number of sampling
interrupts taken and is used as a denominator in the sampling fraction. The sampling fraction is the
number of samples that were 1 (or true) for a sample interrupt. Check that this value is greater than
zero before using it as the denominator in a calculation of SampleFraction.
PerformanceCounterType.SampleFraction – A percentage counter that shows the average ratio of
hits to all operations during the last two sample intervals. Formula: ((N 1 – N 0) / (D 1 – D 0)) x 100,
where the numerator represents the number of successful operations during the last sample
interval, and the denominator represents the change in the number of all operations (of the type
measured) completed during the sample interval, using counters of type SampleBase. Counters of
this type include Cache\Pin Read Hits %.
http://msdn.microsoft.com/en-us/library/system.diagnostics.performancecountertype.aspx