1 files changed, 35 insertions, 0 deletions
diff --git a/Crypto/src/asn1/BerNull.cs b/Crypto/src/asn1/BerNull.cs
new file mode 100644
index 000000000..0751bbac3
--- /dev/null
+++ b/Crypto/src/asn1/BerNull.cs
@@ -0,0 +1,35 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1
+{
+	/**
+	 * A BER Null object.
+	 */
+	public class BerNull
+		: DerNull
+	{
+		public static new readonly BerNull Instance = new BerNull(0);
+
+		[Obsolete("Use static Instance object")]
+		public BerNull()
+		{
+		}
+
+		private BerNull(int dummy) : base(dummy)
+		{
+		}
+
+		internal override void Encode(
+			DerOutputStream  derOut)
+		{
+			if (derOut is Asn1OutputStream || derOut is BerOutputStream)
+			{
+				derOut.WriteByte(Asn1Tags.Null);
+			}
+			else
+			{
+				base.Encode(derOut);
+			}
+		}
+	}
+}