diff --git a/samples/SampleApp/Program.cs b/samples/SampleApp/Program.cs
index 06205db078..16e2d1f487 100644
--- a/samples/SampleApp/Program.cs
+++ b/samples/SampleApp/Program.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
+using System.Linq;
 
 namespace SampleApp
 {