Process to Remove Delete Permissions On SharePoint List

I got a requirement from my client asking me to remove delete permissions on SharePoint List except for SharePoint site Owners group. Thought for a while for the solution, went ahead and create a new SharePoint permission set without delete permission. That's it, task has became very easy. Now go in to the list settings and select list permissions. In the Actions menu select Manage Permissions. you will be prompted with the message that "You are about to create unique permissions for this List. changes made to parent site will no longer refer to this list.". Select Ok. Now select the appropriate SharePoint groups and remove the existing permissions and add the permissions which you have just created. your task is done.

Adding BreadCrumb Navigation to SharePoint Application Pages

With the help of following Blogs I was able to get BreadCrumb on to the SharePoint Applications pages.
http://weblogs.asp.net/jan/archive/2008/04/16/adding-breadcrumb-navigation-to-sharepoint-application-pages-the-easy-way.aspx

http://www.novolocus.com/category/sharepoint/branding/breadcrumbs/
And some additional links which can be done through object model code.
http://blog.thekid.me.uk/archive/2007/01/17/configuring-the-breadcrumb-for-pages-in-layouts.aspx

http://www.mikhaildikov.com/2007/05/creating-dynamic-breadcrumbs-in.html

But the requirement from the client was that they want to see default.master with the SharePoint Application Pages and not Application.master. as we all know that all SharePoint Application pages uses application.master and not default.master page. I have googled for some time and found this wonderful Blog from Jan Tielens which helped me to change the master page from application.master to default.master.
http://weblogs.asp.net/soever/archive/2006/11/14/SharePoint-2007_3A00_-using-the-masterpage-from-your-site-in-custom-_5F00_layouts-pages.aspx

This took me in to new problem. The above technique for adding BreadCrumb navigation bar does not work. Then I have played around for some time and figured out the problem. BreadCrumb Navigation bar was not comming since I was changing the master page on the fly through code on page OnPreInit event. Technique mentioned in the above blog posts works for SahrePoint Application Pages only if the master page is application.master and not default.master. So I have learned that application.master uses "SPXmlContentMapProvider" as SiteMapProviser and default.master uses "SPContentMapProvider" as SiteMapPrivider. This helped me to solve the problem. I have just provided "SPXmlContentMapProvider" as SiteMapProviser as source for my default.master in the following way.

SharePoint Application Page Template


Code Behind

using System;
using System.Collections.Generic;
using System.Data.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
namespace YourNameSpace
{
public class ClassName : PageBase
{
///

/// Variables declaration which includes control names in the .aspx page template
///

///
protected override void OnLoad(EventArgs e)
{
}
}
}