Added an extension method to make it easy for to restrict an IQueryable<IPackage> to the latest version. Handy when consuming NuGet from an application that can't use Linq directly.

src/Core/Extensions/PackageExtensions.cs

@@ -259,6 +259,14 @@ namespace NuGet
             return packages.Where(BuildSearchExpression<T>(propertiesToSearch, nonNullTerms));
         }
 
+        /// <summary>
+        /// Returns a find query that is further restricted to just the latest package version.
+        /// </summary>
+        public static IQueryable<T> FindLatestVersion<T>(this IQueryable<T> packages) where T : IPackage
+        {
+            return from p in packages where p.IsLatestVersion select p;
+        }
+        
         /// <summary>
         /// Constructs an expression to search for individual tokens in a search term in the Id and Description of packages
         /// </summary>