Kill Process Excel C#

The ProcessMainWindow Title will do it for you, it appends "Microsoft Excel - " to the name of the file:

So essentially (quick code):

private void KillSpecificExcelFileProcess(string excelFileName)
    {
        var processes = from p in Process.GetProcessesByName("EXCEL")
                        select p;

        foreach (var process in processes)
        {
            if (process.MainWindowTitle == "Microsoft Excel - " + excelFileName)
                process.Kill();
        }
    }

Use:

KillSpecificExcelFileProcess("example1.xlsx");

Edit: Tested and verified to work.

If your current code is working, this amendment should kill the first process it finds with the name "EXCEL".

foreach (Process clsProcess in Process.GetProcesses())
{
  if (clsProcess.ProcessName.Equals("EXCEL"))
  {
    clsProcess.Kill();
    break;
  }
}

If you want to kill a specific process, you're going to have to give a bit more information.

kd7's post is an awesome answer and works well, just two things to add,

MainWindowTitle format is - "Filename.xlsx - Excel"

If your excel document is not visible then your MainWindowTitle will be "" using the "" for MainWindowTitle will kill all zombie excel process'.