init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Utilities/IO/TeeOutputStream.cs

@@ -0,0 +1,35 @@
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.IO;
+
+public class TeeOutputStream : BaseOutputStream
+{
+	private readonly Stream output;
+
+	private readonly Stream tee;
+
+	public TeeOutputStream(Stream output, Stream tee)
+	{
+		this.output = output;
+		this.tee = tee;
+	}
+
+	public override void Close()
+	{
+		Platform.Dispose(output);
+		Platform.Dispose(tee);
+		base.Close();
+	}
+
+	public override void Write(byte[] buffer, int offset, int count)
+	{
+		output.Write(buffer, offset, count);
+		tee.Write(buffer, offset, count);
+	}
+
+	public override void WriteByte(byte b)
+	{
+		output.WriteByte(b);
+		tee.WriteByte(b);
+	}
+}