diff --git a/NBitcoin/Key.cs b/NBitcoin/Key.cs
index d1e6553e3f..945ff22da3 100644
--- a/NBitcoin/Key.cs
+++ b/NBitcoin/Key.cs
@@ -4,6 +4,7 @@
 using System.Linq;
 using System.Text;
 using NBitcoin.DataEncoders;
+using System.IO;
 #if !HAS_SPAN
 using NBitcoin.BouncyCastle.Math;
 #endif
@@ -154,7 +155,7 @@ public SchnorrSignature SignSchnorr(uint256 hash)
 		{
 			AssertNotDiposed();
 #if HAS_SPAN
-			Span<byte> h = stackalloc byte[32];
+			Span<byte> h = stackalloc byte[KEY_SIZE];
 			hash.ToBytes(h);
 			return new SchnorrSignature(_ECKey.SignSchnorr(h));
 #else
@@ -407,6 +408,18 @@ public BitcoinSecret GetWif(Network network)
 			return new BitcoinSecret(this, network);
 		}
 
+		public byte[] GetSeedBytes()
+		{
+			AssertNotDiposed();
+			byte[] bytes = Enumerable.Repeat((byte)0x00, KEY_SIZE).ToArray();
+			using (var bytesStream = new MemoryStream(bytes))
+			{
+				var stream = new BitcoinStream(bytesStream, true);
+				ReadWrite(stream);
+			}
+			return bytes;
+		}
+
 		public BitcoinEncryptedSecretNoEC GetEncryptedBitcoinSecret(string password, Network network)
 		{
 			AssertNotDiposed();