Writing to Property bag using Feature

Scenario:
Solution:
As SiteCollection ( SPSite object ) does not have a property bag. I created a feature for Scope=Site and updated the property bag for the RootWeb.
Code:

<Feature
 Id="{New GUID}"
 Title="Updates Web Properties."
 Description="This will make necessary changes to the site collection root web properties."
 Scope="Site"
 ReceiverAssembly="Four-part assembly name"
 ReceiverClass="Training.UpdateWebPropertiesReceiver"
 xmlns="http://schemas.microsoft.com/sharepoint/" >
 <!-- no declaratvie elements required -->
 <ElementManifests />
 <Properties >
   <Property Key ="Key1" Value ="Value1"/>
   <Property Key ="Key2" Value ="Value2"/>
 </Properties>
 </Feature>

Code (UpdateWebPropertiesReceiver.cs) :

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;

namespace Training
{
   public class UpdateWebPropertiesReceiver : SPFeatureReceiver
   {
       public override void FeatureInstalled(SPFeatureReceiverProperties properties) { }
       public override void FeatureUninstalling(SPFeatureReceiverProperties properties) { }
       public override void FeatureActivated(SPFeatureReceiverProperties properties)     {
          
           try    {
                   SPSite site = properties.Feature.Parent as SPSite;
                   using (SPWeb web = site.RootWeb)
                   {
                       // Set FeatureProperties to Web Property Bag
                       SetFeaturePropertiesToPropertyBag(properties.Feature.Properties, web);
                   }
           }
           catch    {
               throw;
           }
       }

       public override void FeatureDeactivating(SPFeatureReceiverProperties properties)    {
     
           try     {
               SPSite site = properties.Feature.Parent as SPSite;
               using (SPWeb web = site.RootWeb)  
               {
                   // Reset FeatureProperties to Web Property Bag
                   ResetFeaturePropertiesToPropertyBag(properties.Feature.Properties, web);
               }
           }
          catch  
           {
               throw;
           }
       }

       private void SetFeaturePropertiesToPropertyBag(SPFeaturePropertyCollection featurePropertyCollection, SPWeb web)
       {
           // Loop through each property in the collection
           foreach (SPFeatureProperty featureProperty in featurePropertyCollection)
           {
               // Validate the name and value are populated
               if ((!string.IsNullOrEmpty(featureProperty.Name)) && (!string.IsNullOrEmpty(featureProperty.Value)))
               {
                   // Check if the property name already exists
                   if (web.Properties.ContainsKey(featureProperty.Name))
                   {
                       // Update property with new value
                       web.Properties[featureProperty.Name] = featureProperty.Value;
                   }
                   else
                   {
                       // Add new property with name and value
                       web.Properties.Add(featureProperty.Name, featureProperty.Value);
                   }
               }
           }

           // Update PropertyBag
           web.Properties.Update();
       }

       private void ResetFeaturePropertiesToPropertyBag(SPFeaturePropertyCollection featurePropertyCollection, SPWeb web)
       {
           // Loop through each property in collection
           foreach (SPFeatureProperty featureProperty in featurePropertyCollection)
           {
               try
               {
                   // If the property Name exists, try to set it's corresponding propertybag value to ""
                   if (!String.IsNullOrEmpty(featureProperty.Name))
                   {
                       web.Properties[featureProperty.Name] = string.Empty;
                   }
               }
               catch
               {
               }
           }
           web.Properties.Update();
       }
   }
}