New Post: Invalid compression output for PpmdStream

static byte[] Pack(byte[] data)
        {
            var ppmdProp = new PpmdProperties();
            using(var mem = new MemoryStream())
            using (var ppmd = new PpmdStream(ppmdProp, mem, true))
            {
                ppmd.Write(data, 0, data.Length);
                return mem.ToArray();
            }
        }
static byte[] UnPack(byte[] data, int origSize)
        {
            var ppmdProp = new PpmdProperties();
            var buff = new byte[origSize];
            using(var mem = new MemoryStream(data))
            using (var ppmd = new PpmdStream(ppmdProp, mem, false))
            {
                var l = ppmd.Read(buff, 0, origSize);
                Debug.Assert(l == buff.Length);
                return buff;
            }
        }
[Test]
        public void _01_Ppmd()
        {
            var tb = new byte[]{1,2,3,4,5,6,7,8,9,0};
            var pp = Pack(tb);
            var up = UnPack(pp, tb.Length);
            Assert.AreEqual(tb,up);
         }
[Test]
        public void _02_Ppmd()
        {
            var tb = Enumerable.Range(0, 1000).Select(p => (byte) p).ToArray();
            var pp = Pack(tb);
            var up = UnPack(pp, tb.Length);
            Assert.AreEqual(tb,up);
         }