static bool ProcessCompareInternalName(Process p,string match)
{
    try
    {
        string internalname = p.MainModule.FileVersionInfo.InternalName;
        if (internalname.ToLower() == match.ToLower()) return true;
        else  return false;
    }
    catch (System.ComponentModel.Win32Exception)
    {
        return false;
    }
}

static void Main(string[] args)
{
    var allproc = Process.GetProcesses();

    foreach (Process p in allproc)
    {
        if (ProcessCompareInternalName(p, "program.exe"))
        {
            p.Kill();
        }
    }

}