1 files changed, 5 insertions, 2 deletions
diff --git a/crypto/src/asn1/DerSet.cs b/crypto/src/asn1/DerSet.cs
index c66dde8c7..3df1a6766 100644
--- a/crypto/src/asn1/DerSet.cs
+++ b/crypto/src/asn1/DerSet.cs
@@ -1,5 +1,8 @@
+using System;
 using System.IO;
 
+using Org.BouncyCastle.Utilities;
+
 namespace Org.BouncyCastle.Asn1
 {
 	/**
@@ -98,9 +101,9 @@ namespace Org.BouncyCastle.Asn1
 				dOut.WriteObject(obj);
 			}
 
-			dOut.Close();
+            Platform.Dispose(dOut);
 
-			byte[] bytes = bOut.ToArray();
+            byte[] bytes = bOut.ToArray();
 
 			derOut.WriteEncoded(Asn1Tags.Set | Asn1Tags.Constructed, bytes);
 		}