public void CheckNotSupportedException()
{
var baseStream = new MemoryStream();
var writer = new CustomCompressionStream(baseStream, false);
Assert.Throws <NotSupportedException>(() => writer.SetLength(0));
long x;
Assert.Throws <NotSupportedException>(() => x = writer.Length);
Assert.Throws <NotSupportedException>(() => writer.Position++);
Assert.AreEqual(false, writer.CanSeek);
Assert.Throws <NotSupportedException>(() => writer.Seek(0, SeekOrigin.Current));
}
