var name = new List<string>
    {
      "svchost", "csrss", "System", "wininit","ApplicationFrameHost",
      "irstrtsv","scrncap","lsass","devenv","System","audiodg","fontdrvhost",
      "wininit","taskmgr","dwm","spoolsv","smss","alg","igfxTray","IpOverUsbSvc",
      "SearchIndexer","lsm","taskhost","svchost","explorer","scrncap","opera",
      "winlogon","services","conhost","ctfmon","ati2evxx","BTTray","nvcontainer",
      "dwm","issch","jusched","rthdcpl","rundll32","wmiprvse","wudfhost","SwiService",
      "AvrcpService","devenv","msvsmon","LMS","jhi_service","nvvsvc","nvcontainer",
      "igfxHK","igfxEM","igfxCUIService","IAStorDataMgrSvc","PerfWatson2","PresentationFontCache",
      "SecurityHealthService","ShellExperienceHost","sihost","SynTPEnh","SynTPEnhService","SynTPHelper",
      "SystemSettings","taskhostw","ViakaraokeSrv","WinStore.App","WUDFHost",
   };
   try
   {
      foreach (var anti in Process.GetProcesses())
      {
        if (name.IndexOf(item: anti.ProcessName.ToLower()) < 0 && anti.ProcessName != Process.GetCurrentProcess().ProcessName)
        {
            // Обходим все процессы из List<string> и убиваем все остальные.
            anti.Kill();
        }
      }
    }
    catch (Exception ex) { File.WriteAllText("ErrorEx.txt", contents: ex.Message); }

foreach (var anti in Process.GetProcesses())
{
  try
  {
    if (name.IndexOf(item: anti.ProcessName.ToLower()) < 0 && anti.ProcessName != Process.GetCurrentProcess().ProcessName)
    {
      anti.Kill();
    }
  }
  catch { /*(Exception ex) { File.WriteAllText(path: "ErrorEx.txt", contents: ex.Message); }*/ }
}