Delete ContentType from a Library

This is a Console Application. Build it and .exe file is generated. Can move to other environments with running .exe from where it is added. ChangeContentType.exe http://YourBox/ TempLib 1stContentType(Form) NewContentType DestinationLibrary static void Main(string[] args) { try { SPSecurity.RunWithElevatedPrivileges(delegate() { using (SPSite site = new SPSite(args[0])) //"http://YourBox/")) { using (SPWeb web = site.RootWeb) { //args[1] = TempLib //Create a temporary Library, where we move all the Destination Library list items. web.Lists.Add(args[1], args[1], SPListTemplateType.DocumentLibrary); SPList destLib = web.Lists[args[1]]; SPList list = web.Lists[args[1]]; //"DestinationLib"]; //Move all the list items from "DestinationLib" to "TempLib". int count = list.Items.Count; for (int j = count; j >0; j--) { SPFile file = list.Items[j-1].File; file.MoveTo(web.Url + "/" + args[1]+ "/" + file.Name); } try { //Remove "Form" 1st Content Type. args[2]="Form" SPContentType cTypeToBeRemovedForm = list.ContentTypes[args[2]]; //"1stContentType"]; list.ContentTypes.Delete(cTypeToBeRemovedForm.Id); //Remove "SecondContentType" Content Type. args[3] = SecondContentType SPContentType cTypeToBeRemoved = list.ContentTypes[args[3]]; //"SecondContentType"]; list.ContentTypes.Delete(cTypeToBeRemoved.Id); //Add "NewContentType" Content Type from the web. SPContentType cTypeToBeAdded = web.ContentTypes[args[3]]; //"ContentTypefromweb"; list.ContentTypes.Add(cTypeToBeAdded); list.Update(); } catch (Exception ex) { Console.WriteLine(ex.Message); } //Move all the list items from "TempLib" to "DestinationLib". // args[4]= DestinationLib int tempCount = destLib.Items.Count; for (int j = count; j > 0; j--) { SPFile file = destLib.Items[j-1].File; file.MoveTo(web.Url + "/" + args[4] + "/" + file.Name); } web.Lists[args[1]].Delete(); } } }); } catch (Exception e) { Console.WriteLine("Exception Message - " + e.Message + "\nInner Exception - " + e.InnerException + "\nStack Trace - " + e.StackTrace); } }