A patch release. The headline fix is packaging: the NAudio and NAudio.Extras meta-packages now ship a plain net9.0-windows leg, so WinForms and WPF projects targeting netX.0-windows get the full Windows stack again.

• Breaking: AudioFileReader now throws NotSupportedException instead of InvalidOperationException when the cross-platform build is asked for a format it cannot read, and the messages simply state that rather than suggesting an NAudio.Wasapi install that could never have helped (#1407)
• Fixed the NAudio and NAudio.Extras meta-packages resolving their portable net9.0 asset on projects targeting a plain netX.0-windows TFM (the WinForms/WPF template default), which silently dropped the entire Windows stack — no WaveOut, WASAPI, Media Foundation, ASIO, DMO or WinForms types, and AudioFileReader throwing "MP3 file reading requires the NAudio.Wasapi package". Both packages now also ship a plain net9.0-windows leg (#1407)
• Projects on a plain netX.0-windows TFM may now see CA1416 warnings when calling WASAPI process-loopback capture. The warning is correct — those callers do need an OperatingSystem.IsWindowsVersionAtLeast(10, 0, 19041) guard — and was previously hidden because the only Windows asset available already implied that floor (#1407)
• Sample and tool apps now roll forward onto newer .NET runtimes, so running them no longer requires the .NET 9 runtime to be installed (#1408)
• Fixed AiffFileReader reporting too long a Length and throwing IndexOutOfRangeException when the SSND chunk declares a non-zero offset (#1405)
• Fixed AiffFileReader.Read throwing IndexOutOfRangeException when the source stream returns fewer bytes than requested (#1405)