private void button1_Click(object sender, EventArgs e)
{
// 调用代码
string[] cmd = new string[] { "ping 192.168.3.15 -n 1", "ping 192.168.3.16 -n 2" };
MessageBox.Show(Cmd(cmd));
CloseProcess("cmd.exe");
}

/// <summary>
/// 运行CMD命令
/// </summary>
/// <param name="cmd">命令</param>
/// <returns></returns>
public static string Cmd(string [] cmd)
{
Process p = new Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
p.Start();
p.StandardInput.AutoFlush = true;
for (int i = 0; i < cmd.Length; i++)
{
p.StandardInput.WriteLine(cmd[i].ToString());
}
p.StandardInput.WriteLine("exit");
string strRst = p.StandardOutput.ReadToEnd();
p.WaitForExit();
p.Close();
return strRst;
}

/// <summary>
/// 关闭进程
/// </summary>
/// <param name="ProcName">进程名称</param>
/// <returns></returns>
public static bool CloseProcess(string ProcName)
{
bool result = false;
System.Collections.ArrayList procList = new System.Collections.ArrayList();
string tempName = "";
int begpos;
int endpos;
foreach (System.Diagnostics.Process thisProc in System.Diagnostics.Process.GetProcesses())
{
tempName = thisProc.ToString();
begpos = tempName.IndexOf("(") + 1;
endpos = tempName.IndexOf(")");
tempName = tempName.Substring(begpos, endpos - begpos);
procList.Add(tempName);
if (tempName == ProcName)
{
if (!thisProc.CloseMainWindow())
thisProc.Kill(); // 当发送关闭窗口命令无效时强行结束进程
result = true;
}
}
return result;
}

转摘自:http://www.cnblogs.com/njnudt/archive/2009/12/03/1616135.html