Development Class C#

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;
public class Form1 : System.Windows.Forms.Form {
    private System.Windows.Forms.ColumnHeader VirtualMemory;
    private System.Windows.Forms.ColumnHeader Priority;
    private System.Windows.Forms.ColumnHeader Id;
    private System.Windows.Forms.Label machinename;
    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Label label3;
    private System.Windows.Forms.ListBox listBox1;
    private System.Windows.Forms.Label label2;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.ListView listView1;
    private System.Windows.Forms.ColumnHeader ThreadID;
    private System.Windows.Forms.ColumnHeader ThreadPriority;
    private System.Windows.Forms.ColumnHeader ProcessorTime;
    private ArrayList sProcIds;
    public Form1() {
        this.label1 = new System.Windows.Forms.Label();
        this.label2 = new System.Windows.Forms.Label();
        this.label3 = new System.Windows.Forms.Label();
        this.machinename = new System.Windows.Forms.Label();
        this.ThreadPriority = new System.Windows.Forms.ColumnHeader();
        this.ThreadID = new System.Windows.Forms.ColumnHeader();
        this.VirtualMemory = new System.Windows.Forms.ColumnHeader();
        this.listBox1 = new System.Windows.Forms.ListBox();
        this.listView1 = new System.Windows.Forms.ListView();
        this.ProcessorTime = new System.Windows.Forms.ColumnHeader();
        this.Priority = new System.Windows.Forms.ColumnHeader();
        this.Id = new System.Windows.Forms.ColumnHeader();
        this.button1 = new System.Windows.Forms.Button();
        this.SuspendLayout();
        this.label1.Location = new System.Drawing.Point(16, 16);
        this.label1.Size = new System.Drawing.Size(88, 16);
        this.label1.Text = "Machine name:";
        this.label2.Location = new System.Drawing.Point(16, 48);
        this.label2.Size = new System.Drawing.Size(100, 16);
        this.label2.Text = "Running Processes:";
        this.label3.Location = new System.Drawing.Point(16, 184);
        this.label3.Size = new System.Drawing.Size(100, 16);
        this.label3.Text = "Threads:";
        this.machinename.Location = new System.Drawing.Point(128, 16);
        this.machinename.Size = new System.Drawing.Size(100, 16);
        this.ThreadPriority.Text = "Priority";
        this.ThreadID.Text = "Thread ID";
        this.VirtualMemory.Text = "Virtual Mem";
        this.listBox1.Location = new System.Drawing.Point(16, 80);
        this.listBox1.Size = new System.Drawing.Size(408, 95);
        this.listBox1.SelectedIndexChanged += new
           System.EventHandler(this.SelectItemHandler);
        this.listView1.Columns.AddRange(new
           System.Windows.Forms.ColumnHeader[] {
          this.ThreadID,
          this.ThreadPriority,
          this.ProcessorTime});
        this.listView1.Location = new System.Drawing.Point(16, 200);
        this.listView1.Size = new System.Drawing.Size(408, 97);
        this.ProcessorTime.Text = "Processor Time";
        this.ProcessorTime.Width = 90;
        this.Priority.Text = "Priority";
        this.Id.Text = "ID";
        this.Id.Width = 20;
        this.button1.Location = new System.Drawing.Point(352, 312);
        this.button1.Size = new System.Drawing.Size(64, 24);
        this.button1.Text = "Close";
        this.button1.Click += new
             System.EventHandler(this.button1_Click);
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(440, 349);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                     this.listView1,
                     this.machinename,
                     this.button1,
                     this.label3,
                     this.listBox1,
                     this.label2,
                     this.label1});
        this.ResumeLayout(false);
        sProcIds = new ArrayList();
        machinename.Text = Process.GetCurrentProcess().MachineName;
        Process[] sProcess = Process.GetProcesses();
        foreach (Process p in sProcess) {
            listBox1.Items.Add(p.ProcessName);
            sProcIds.Add(p.Id);
        }
    }
    protected void SelectItemHandler(object sender, System.EventArgs e) {
        int idx = this.listBox1.SelectedIndex;
        Process proc = Process.GetProcessById((int)sProcIds[idx]);
        ProcessThreadCollection procThreads = proc.Threads;
        this.listView1.View = System.Windows.Forms.View.Details;
        this.listView1.Items.Clear();
        int nRow = 0;
        foreach (ProcessThread pt in procThreads) {
            string priority = "Normal";
            switch ((int)proc.BasePriority) {
                case 8:
                    priority = "Normal";
                    break;
                case 13:
                    priority = "High";
                    break;
                case 24:
                    priority = "Real Time";
                    break;
                case 4:
                default:
                    priority = "Idle";
                    break;
            }
            this.listView1.Items.Add(pt.Id.ToString());
            this.listView1.Items[nRow].SubItems.Add(priority);
            this.listView1.Items[nRow].SubItems.Add(pt.UserProcessorTime.ToString());
            nRow++;
        }
    }
    protected void button1_Click(object sender, System.EventArgs e) {
        Close();
    }
    public static void Main(string[] args) {
        Application.Run(new Form1());
    }
}