diff --git a/CodeSamples/Certificates/CompareTwoCerts.cs b/CodeSamples/Certificates/CompareTwoCerts.cs
index 06f91e3..3f8373b 100644
--- a/CodeSamples/Certificates/CompareTwoCerts.cs
+++ b/CodeSamples/Certificates/CompareTwoCerts.cs
@@ -25,7 +25,6 @@
 //
 //------------------------------------------------------------------------------
 
-using System;
 using System.Security.Cryptography;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;