Ya after some long time i got chance to write an article
about,How to get CPU and Memory usage via our C#.NET.After some bit of research i found two methods are avialble,one by using WMI and System.Management class,till now i have n’t succeeded in implement the above scheme.Another simple methos avilable is using the PerformanceCounter class avilable in System.Diagnostic name space.You can find a lot of forums discussing about it also you can see that these codes show a 0% CPU use.So your are confused dont worry “Main hoon na”.
How to find the CPU usage?
1.Create a windows application in VS2005.
2.Add a timer to the Form set its interwell as 200,also set the enable property of timer true.
3.Declare an object of the performance counter class as
private PerformanceCounter cpuCounter; .
4.Create a method InitialiseCPUCounter() and initialize cpuCounter object as shown
private void InitialiseCPUCounter()
{
cpuCounter = new PerformanceCounter(
"Processor",
"% Processor Time",
"_Total",
true
);
}
5.On the tick event of the timer write the following code
private void updateTimer_Tick(object sender, EventArgs e)
{
this.textBox1.Text = "CPU Usage: " +
Convert.ToInt32(cpuCounter.NextValue()).ToString() +
"%";
}
6.Dont forget to call the InitialiseCPUCounter() method from Forms constructor and also start the timer at there.

Full code is given below
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
namespace WindowsApplication5
{
public partial class Form1 : Form
{
private PerformanceCounter cpuCounter;
private PerformanceCounter ramCounter;
public Form1()
{
InitializeComponent();
InitialiseCPUCounter();
InitializeRAMCounter();
updateTimer.Start();
}
private void updateTimer_Tick(object sender, EventArgs e)
{
this.textBox1.Text = "CPU Usage: " +
Convert.ToInt32(cpuCounter.NextValue()).ToString() +
"%";
this.textBox2.Text = Convert.ToInt32(ramCounter.NextValue()).ToString()+"Mb";
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void InitialiseCPUCounter()
{
cpuCounter = new PerformanceCounter(
"Processor",
"% Processor Time",
"_Total",
true
);
}
private void InitializeRAMCounter()
{
ramCounter = new PerformanceCounter("Memory", "Available MBytes", true);
}
}
}