c# - Removing elements with Except -

below have method supposed delete versions of file except newest. except call not producing result i'm expecting , after looking @ docs once again can't seem understand why. purpose of debugging i've moved linq query except out of foreach condition. when debug newest correctly set recent log file, after next line executes todelete still contains newest, why? missing here? relevant code below. method gets called passing file set static part of log name, after has time stamp. both where(x => x.contains(file)) work expect them to.

public static void cleanuplocalcopies(string file) {     string[] localfiles = directory.getfiles(".\\");      string newest = files.where(x => x.contains(file)).orderbydescending(x => x).firstordefault();     var todelete = localfiles.where(x => x.contains(file)).except(new string[] { newest });      foreach (string f in todelete)     {         file.delete(f);     } } 

in case, can use skip skip first file directly, , avoid except call:

var todelete = files.where(x => x.contains(file)).orderbydescending(x => x).skip(1);