Create ef6-query-include-optimized-filter.md

Author: waqasm78

docs2/pages/ef-docs/documentations/query-include-optimized/options/ef6-query-include-optimized-filter.md

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+---
+Permalink: ef6-query-include-optimized-filter
+---
+
+# EF+ Query IncludeOptimized Filter
+
+Same as with EF+ Query IncludeFilter, it is possible to filter which related entities to load and then to launch a query.
+
+{% include template-example.html %} 
+```csharp
+
+// using Z.EntityFramework.Plus; // Don't forget to include this.
+var ctx = new EntitiesContext();
+
+var orders = ctx.Orders.IncludeOptimized(x => x.Items.Where(y => y.IsActive));
+
+```
+[Try it](https://dotnetfiddle.net/uFBqTO)