Custom EventReceiver Feature not appearing in manage feature list

Recently while deploying event receiver on one of the web application i faced a strange issue. My solution file got deployed successfully, but the feature was not visible in "Manage Site Features" of the site for which I have to activate the event receiver.

The web application was migrated from 2010 to 2013.

The web results returned from google search was not resolving my issue.

Since it was not available in "Manage Site Features" I tried to activate using powershell, using below command:

Enable-SPFeature -identity  -URL yoursiteURL

The command failed with error

The feature is not a Farm Level feature and is not found in a Site level defined by the Url [Site Collection Url].

Then google search for this error message, return the actual cause for the issue. While migrating site from 2010 to 2013, we have not done the visual upgrade of the site. And because of this the feature was not available in "Manage Feature List"

So the solution was to install wsp file with compatibility level.

Install-SPSolution -Identity "Solution.wsp"  –GACDeployment -CompatibilityLevel{14,15}

This resolved the issue, and feature appeared in Manage Site Features. Hope this helps.!!!!!

When to use BeforeProperties, AfterProperties, properties.ListItem in event receiver

Below table give us the idea on when to use BeforeProperties, AfterProperties, properties.ListItem in event receiver

Library	BeforeProperties	AfterProperties	properties.ListItem
ItemAdding	No value	No value	Null
ItemAdded	No value	No value	New value
ItemUpdating	Original value	Changed value	Original value
ItemUpdated	Original value	Changed value	Changed value
ItemDeleting	No value	No value	Original value
ItemDeleted	No value	No value	Null

Hope this helps!!!