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();        

        }  

    }
}