gistfile1.txt

	    public static McpeBatch CreateBatchPacket(byte[] input, CompressionLevel compressionLevel, bool writeLen = false)
	    {
	        return CreateBatchPacket(input, 0, input.Length, compressionLevel, writeLen);
	    }

		public static McpeBatch CreateBatchPacket(byte[] input, int offset, int length, CompressionLevel compressionLevel, bool writeLen = false)
		{
		    var packet = McpeBatch.CreateObject();
		    
		    using (MemoryStream stream = MiNetServer.MemoryStreamManager.GetStream())
		    {
		        stream.WriteByte(0x78);
		        switch (compressionLevel)
		        {
		            case CompressionLevel.Optimal:
		                stream.WriteByte(0xda);
		                break;
		            case CompressionLevel.Fastest:
		                stream.WriteByte(0x9c);
		                break;
		            case CompressionLevel.NoCompression:
		                stream.WriteByte(0x01);
		                break;
		        }
		        int checksum;
		        using (var compressStream = new ZLibStream(stream, compressionLevel, true))
		        {
		            byte[] lenBytes = BitConverter.GetBytes(input.Length);
		            Array.Reverse(lenBytes);
		            if (writeLen) compressStream.Write(lenBytes, 0, lenBytes.Length); // ??
		            compressStream.Write(input, 0, input.Length);
		            checksum = compressStream.Checksum;
		        }

		        byte[] checksumBytes = BitConverter.GetBytes(checksum);
		        if (BitConverter.IsLittleEndian)
		        {
		            // Adler32 checksum is big-endian
		            Array.Reverse(checksumBytes);
		        }
		        stream.Write(checksumBytes, 0, checksumBytes.Length);

		        packet.payload = stream.GetBuffer();
		        packet.payloadSize = (int) stream.Length;
		        packet.Encode();
		    }

		    return packet;
		}