为什么压缩流的长度总是 10

我正在测试一些代码。我被困在以下几点上。我写的是什么text，压缩流的长度总是 10？我做错了什么？

var inStream = new MemoryStream();
var inWriter = new StreamWriter(inStream);
str text = "HelloWorldsasdfghj123455667880fgsjfhdfasdferrbvbyjun hbwecwcxqsz    edcrgvebrjnuj5juerqwetsrgfggshurhtnbvzkfjhguhgrgal;kjhao;rhl;zkfhg;aorihghg;oahrgarhguhh';aaeaeiaijeihjrhfidfhfidfidhh953453453";
inWriter.WriteLine(text);
inWriter.Flush();
inStream.Position = 0;
var outStream = new MemoryStream();
var compressStream = new GZipStream(outStream, CompressionMode.Compress);
inStream.CopyTo(compressStream);
compressStream.Flush();
outStream.Flush();
compressStream.Flush();
outStream.Position = 0;
Console.WriteLine(outStream.Position);
Console.WriteLine(outStream.Length);