Programatically set default Page layout of site to Custom page layout

In my previous post, we have learned how to create custom page layouts using feature.

Requirement:
We need to set the custom page layout created as the default page layout of the site.
Say if a user creates a new page, it should create a page which is using the custom layout.
We need to achieve this programatically.

Solution:

We can achieve this by writing the code within the receiver of the feature created.

public override void FeatureActivated(SPFeatureReceiverProperties properties)

{   

    SPSite site = properties.Feature.Parent as SPSite;

    SPWeb web = null;

    if (site == null)

    {

         web = properties.Feature.Parent as SPWeb;

         if (web == null) return;

         site = web.Site;

    }

    else web = site.RootWeb;

       //Get the publishing web object

    PublishingWeb objPublishingWeb = PublishingWeb.GetPublishingWeb(web);

    //Set default page layout of site to internal page layout  (InnerPage.aspx)             

    if (objPublishingWeb != null)

    {

       PageLayout _pageLayout = (from _pl in objPublishingWeb.GetAvailablePageLayouts()

                               where _pl.Name == "InnerPage.aspx"

                               select _pl).FirstOrDefault();

       objPublishingWeb.SetDefaultPageLayout(_pageLayout, true);

       objPublishingWeb.Update();

    }

}