How to get CPU usage for more than 2 cores?

Question

I try to get in my program CPU usage divided by a cores. Now I use the PerformanceCounter and changing the InstanceName between 0 and 1 I have the data from 2 cores.

Answer 1

foreach (var item in new System.Management.ManagementObjectSearcher("Select NumberOfLogicalProcessors from Win32_Processor").Get())
    coreCount += int.Parse(item["NumberOfLogicalProcessors"].ToString());

PerformanceCounter[] pc = new PerformanceCounter[coreCount];

for (int i = 0; i < coreCount; i++)
    pc[i] = new PerformanceCounter("Processor", "% Processor Time", i.ToString());