将字符串与进程名称进行比较

我想这样做...如果记事本在前台，它会打开计算器...如果另一个程序处于打开状态，则不执行任何操作...记事本是OEPN手动的..."开始，记事本"...我有这个代码来"查看"记事本是否打开......不知道如何继续 D：我知道我必须使用

if (switch == 0)
{
if (SOMETHING == "Notepad")
{
   var switch = 1 //so it doesnt enters in a loop
   OPEN CALCULATOR //irrelevant, i may use another part of otrher code that is already working
   }
}

"switch"变量从代码开头开始就是0，所以这将起作用（希望）

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll", SetLastError = true)]
static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
Process GetActiveProcess()
{
    IntPtr hwnd = GetForegroundWindow();
    uint pid;
    GetWindowThreadProcessId(hwnd, out pid);
    Process p = Process.GetProcessById((int)pid);
    return p;
}

问题是我不知道在"SOMETHING"上放什么来使用其余的代码，以及在哪里或如何使用 If...

Process[] notePadProcesses  = Process.GetProcessesByName("notepad.exe");
IntPtr activeWindowHandle = GetForegroundWindow();
if (notePadProcesses != null && notePadProcesses.Length > 0
    && notePadProcesses.Any(p=>p.MainWindowHandle == activeWindowHandle))
{
 // notepad is open in the foreground.
 switch = 1;
 // OPEN Calculator or whatever you need to.
}
else
{
 // notepad is either not open, or not open in the foreground.
}