Deleting all inherit sub-folders permission and reassigning to specific group

Question

Hi,
i am trying to assign sub-folders level permission in sharepoint document library. Want to delete all previous inherit permission first and then assign  sub-folders permission to specific group. i am having problem with following code, cannot make a
call to the function. Could you tell me what should i modify the code to work properly.
Thanks in advanced
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
namespace ManageFolderLevelPermission
    class FolderLeverPermission
        static void Main(string[] args)
            //Connect to Sharepoint Site
            SPSite oSPSite = new SPSite("http://nyc01d1sp:8080/");
            //Open Sharepoint Site
            SPWeb web = oSPSite.OpenWeb("/hr/DI/");
            //Get the Sharepoint list item for giving permission
            foreach(SPFolder folder in web.GetFolder("http://nyc01d1sp:8080/hr/DI/docs/").SubFolders);
            setPermissions();
        private static void setPermissions(SPFolder folder,SPSite oSPSite, SPWeb web)
            SPGroupCollection spc = web.SiteGroups;
            //Break the role inheritance in order to assign individual rights on folders
            if (!folder.Item.HasUniqueRoleAssignments)
                folder.Item.BreakRoleInheritance(true);
            while (folder.Item.RoleAssignments.Count > 0)
                try
                    folder.Item.RoleAssignments.Remove(0);
                catch (Exception)
                    break;
            //Role Assignment For the Current User
            SPUser CurrentUser = SPContext.Current.Web.CurrentUser;
            SPGroup group = spc["GroupName"];
            SPRoleAssignment roleAssignment = new SPRoleAssignment((SPPrincipal)CurrentUser);
            roleAssignment.RoleDefinitionBindings.Add(web.RoleDefinitions.GetByType(SPRoleType.Administrator));
            folder.Item.RoleAssignments.Add(roleAssignment);
            //Role Assignment for the Group "Contentteam - Management"
            roleAssignment = new SPRoleAssignment((SPPrincipal)group);
            roleAssignment.RoleDefinitionBindings.Add(web.RoleDefinitions.GetByType(SPRoleType.Administrator));
            folder.Item.RoleAssignments.Add(roleAssignment);            
            oSPSite.AllowUnsafeUpdates = true;
            folder.Item.Update();

Answer 1

Hi Hemendra,
Thanks for your reply. Actually i am trying to do two things here. First i am creating sub-folders using following code. And then trying to assign individual group permission on these sub-folders using following Powershell script. Now problem is when i am
creating sub-folders, its also inheriting all the parent permission. Lets say i have customer folder name "Pepsi" and it has 4 sub-folders (like Account Management, Legal Drafts, Executed.. etc) . Now i want to assign individual group permission to each Sub-folder
but root folder (Pepsi) should remain all the parent permissions. i did try to remove the permission first and then assigned permission to sub-folders. i was able to assign individual group permission to sub-folders but problem is, its also assigning Limited
Access to the root folder. so basically i cannot see the folder as the root folder has limited access. Please let me know how can achieve that.
using System;
using System.Collections.Generic;
using Microsoft.SharePoint;
namespace Add_SubFolders
    class CreateFolders
        static void Main(string[] args)
            var foldersList=new List<string>();
            SPSecurity.RunWithElevatedPrivileges(delegate()
                try
                    using (SPSite site = new SPSite("http://nyc01d1sp:8080/"))
                        using (SPWeb web = site.OpenWeb("/lel/DB/"))
                            web.AllowUnsafeUpdates = true;
                                foreach (SPFolder folder in web.GetFolder("http://nyc01d1sp:8080/lel/DB/docs").SubFolders)
                                    if (folder.Url.ToString() != "/docs/Forms" && folder.Url.ToString() != "/docs/")
                                        foldersList.Add(folder.Url);
                                        SPFolder subFolder = web.GetFolder(folder.Url);
                                        Console.WriteLine("SubFolder is creating.....");
                                        subFolder.SubFolders.Add("Account Management");
                                        subFolder.SubFolders.Add("Legal Drafts");
                                        subFolder.SubFolders.Add("Executed");
                                        subFolder.SubFolders.Add("Sales");
                                    folder.Update();
                                    Console.WriteLine("SubFolder has been created");
                                web.AllowUnsafeUpdates = false;
                catch (Exception ex)
                    ex.Message.ToString();
  Power Shell Script to assign individual group to specific folders:
Add-PSSnapin Microsoft.SharePoint.PowerShell -erroraction SilentlyContinue
  #$site = new-object Microsoft.SharePoint.SPSite("http://nyc01d1sp:8080/lel/DB/")
  #$site = Get-SPSite ("http://nyc01d1sp:8080/")
  $web= Get-SPWeb("http://nyc01d1sp:8080/")
  #$web = $site.OpenWeb()
  function GrantGroupPermission($groupName)
   [Microsoft.SharePoint.SPGroupCollection]$spgroups = $web.SiteGroups
   [Microsoft.SharePoint.SPGroup]$spgroup = $spgroups[$groupName]
   Write-Host $spgroup.Name -ForegroundColor Red
   $sproleass=new-object Microsoft.SharePoint.SPRoleAssignment([Microsoft.SharePoint.SPPrincipal]$spgroup)
   $folder.BreakRoleInheritance("true")
   $sproleass.RoleDefinitionBindings.Add($web.RoleDefinitions["Contribute"])
   $folder.RoleAssignments.Add($sproleass);
   Write-Host "Permission provided for group ", $groupName
  $doclib=[Microsoft.SharePoint.SPDocumentLibrary]$web.Lists["Shared Documents"]
  $foldercoll=$doclib.Folders;
  foreach($folder in $foldercoll)
   Write-Host $folder.Name
   if($folder.Name.Equals("Account Management"))
    GrantGroupPermission("Test Group")
   if($folder.Name.Equals("Executed"))
    GrantGroupPermission("Legal Group")
   if($folder.Name.Equals("Legal Drafts"))
    GrantGroupPermission("Legal Group")
   if($folder.Name.Equals("Sales"))
    GrantGroupPermission("Sales Group")
  Write-Host "Completed...."
  $web.Close()
  $web.Dispose()
  #$site.Dispose()