方法一：

using System.Diagnostics; 


Process[] vProcesses = Process.GetProcesses(); 
foreach (Process vProcess in vProcesses) 
if (vProcess.ProcessName.Equals( "iexplore ", 
StringComparison.OrdinalIgnoreCase)) 
{ 
MessageBox.Show( "IE已經打開 "); 
break; 
}


方法二：

using System.Diagnostics;


Process[] app = Process.GetProcessesByName("AMS");
            if (app.Length > 0)
            {
                MessageBox.Show("請關閉已經啟動的程序后再進行嘗試");
                return;
            }
            else
            {
                System.Diagnostics.Process.Start("AMS.exe");
            }


殺死進程：查找到對應的進程后就可以調用系統(tǒng)命令殺死指定名稱的進程

            Process[] p = Process.GetProcessesByName("AMS");
            foreach (Process ps in p)
            {
                ps.Kill();
            }