Enumerating All SPWebs In SPFarm.Local Into Strongly Typed Collection

So when enumerating the SPWebs within a SPFarm to build a strongly typed SPWeb collection for whatever purpose your enumeration might look like this:

[csharp]

public static List WebsPreppedForIteration()
{
var collection = new List();
foreach (SPSite x in SPFarm.Local.Services.OfType().SelectMany
(svc => ((svc).WebApplications.Where
(webApp => !webApp.Properties.ContainsKey(“Microsoft.Office.Server.SharedResourceProvider”)).SelectMany
(webApp => webApp.Sites.Cast()))).Where
(x => !Equals(x.RootWeb.Title, “Central Administration”)))
{
collection.AddRange(x.RootWeb.Webs.Cast());
}
return collection;
}

[/csharp]

I saw this in a code review today. The part I am wondering about is the SPWebApplication property bag to query the key for WCAM as opposed to do a clunky string SPWeb.Title comparison. Putting the keys out to standard output hasn’t yielded anything particularly evident, and I’m getting frustrated with the under-the-hood, unnecessary foreach loop with a fancy shirt on (the second LINQ query against the Title property(,

Does anyone know the key for WCAM?

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