c#如何启动/干掉/查找 进程

using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace ProcessDemo
{
 public partial class Form1 : Form
    {
 public Form1()
        {
            InitializeComponent();
        }

 private void Form1_Load(object sender, EventArgs e)
        {
 this.linkLabel1.Links.Add(0, linkLabel1.Text.Length, "http://yjmyzz.cnblogs.com/");
        }

 private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
 this.linkLabel1.Links[linkLabel1.Links.IndexOf(e.Link)].Visited = true;
 string target = e.Link.LinkData as string;
 if (target != null && target.StartsWith("http://"))
            {
                Process.Start(target);
            }            
        }

 /// <summary>
 /// 列出所有可访问进程
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void btnList_Click(object sender, EventArgs e)
        {
            Process[] processes;
            processes = Process.GetProcesses();
 string str = "";
 foreach (Process p in processes)
            {
 try
                {
                    str = p.ProcessName;
 this.lst1.Items.Add("名称：" + p.ProcessName + "，启动时间：" + p.StartTime.ToShortTimeString() + "，进程ID：" + p.Id.ToString() );
                }
 catch (Exception ex)
                {
 this.lst1.Items.Add(ex.Message.ToString());//某些系统进程禁止访问，所以要加异常处理
                }
            }

        }

 private void btnFind_Click(object sender, EventArgs e)
        {
            txtFind.Text = txtFind.Text.Trim().ToLower();
 if (txtFind.Text.Length > 0) 
            {
                Process[] arrP = Process.GetProcesses();
 foreach (Process p in arrP)
                {
 try
                    {
 if (p.ProcessName.ToLower() == txtFind.Text)
                        {
                            MessageBox.Show(txtFind.Text + " 找到了，PID为 " + p.Id.ToString());
 return;
                        }
                    }
 catch { }
                }

                MessageBox.Show("未找到该进程，请检查输入!");
            }
        }

 private void btnKill_Click(object sender, EventArgs e)
        {
            txtFind.Text = txtFind.Text.Trim().ToLower();
 int pid = -1;
 if (txtFind.Text.Length > 0)
            {
                Process[] arrP = Process.GetProcesses();
 foreach (Process p in arrP)
                {
 try
                    {
 if (p.ProcessName.ToLower() == txtFind.Text)
                        {
                            pid = p.Id;
 break;
                        }
                    }
 catch { }
                }

 if (pid != -1) 
                {
                    RunCmd("ntsd -c q -p " + pid);
                }
 
            }
        }


 /// <summary> 
 /// 运行DOS命令   
 /// DOS关闭进程命令(ntsd -c q -p PID )PID为进程的ID   
 /// </summary> 
 /// <param name="command"></param> 
 /// <returns></returns> 
 public string RunCmd(string command)
        {
 
            Process p = new Process();

 

            p.StartInfo.FileName = "cmd.exe";           
            p.StartInfo.Arguments = "/c " + command;    
            p.StartInfo.UseShellExecute = false;       
            p.StartInfo.RedirectStandardInput = true;   
            p.StartInfo.RedirectStandardOutput = true;  
            p.StartInfo.RedirectStandardError = true;  
            p.StartInfo.CreateNoWindow = true;          

            p.Start();            

 return p.StandardOutput.ReadToEnd();        

        }  

    }
}