1 files changed, 5 insertions, 2 deletions
diff --git a/crypto/src/asn1/DerSequence.cs b/crypto/src/asn1/DerSequence.cs
index b50a77962..a76cf2882 100644
--- a/crypto/src/asn1/DerSequence.cs
+++ b/crypto/src/asn1/DerSequence.cs
@@ -1,6 +1,9 @@
+using System;
 using System.Collections;
 using System.IO;
 
+using Org.BouncyCastle.Utilities;
+
 namespace Org.BouncyCastle.Asn1
 {
 	public class DerSequence
@@ -75,9 +78,9 @@ namespace Org.BouncyCastle.Asn1
 				dOut.WriteObject(obj);
 			}
 
-			dOut.Close();
+            Platform.Dispose(dOut);
 
-			byte[] bytes = bOut.ToArray();
+            byte[] bytes = bOut.ToArray();
 
 			derOut.WriteEncoded(Asn1Tags.Sequence | Asn1Tags.Constructed, bytes);
 		}