C# get current CPU usage, Memory usage, Disk usage

There is a performancecounter component you can add to your project which allows you to get these values.

System.Diagnostics.PerformanceCounter

Set the category name and counter name, use multiple objects to get all of the data you need

I hope this helps

For CPU and Memory Usage you can see this code project. For memory u need to just add properties of memory in the Processes .
http://www.codeproject.com/KB/system/processescpuusage.aspx

For Disk Usage you can use DriveInfo Class
Here is the msdn link with an example
http://msdn.microsoft.com/en-us/library/system.io.driveinfo.aspx

For CPU Usage, use PerformanceCounter CLass from System.Diagnostics.

For example.

PerformanceCounter cpu;
PerformanceCounter ramr;

cpu = new PerformanceCounter();
cpu.CategoryName = "Processor";
cpu.CounterName = "% Processor Time";
cpu.InstanceName = "_Total";

ram = new PerformanceCounter("Memory", "Available MBytes");


public string getCurrentCpuUsage()
{
            cpu.NextValue()+"%";
}

public string getAvailableRAM()
{
            ramCounter.NextValue()+"MB";
}


For Disk usage here is a sample program.

Using System.IO;
using System;

class Info {
    public static void Main() {
        DriveInfo[] drives = DriveInfo.GetDrives();
        foreach (DriveInfo drive in drives) {
            //There are more attributes you can use.
            //Check the MSDN link for a complete example.
            Console.WriteLine(drive.Name);
            if (drive.IsReady) Console.WriteLine(drive.TotalSize);
        }
    }
}

I hope this helps