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Changelog

All notable changes to this project are documented here. The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[5.9.5] - 2026-07-20

Fixed

  • Rare IOException: The process cannot access the file … .download when finalizing a download (issue #239): downloader-owned file deletions now retry with exponential backoff (~3s) to ride out transient external locks (e.g. antivirus real-time scans); a permanent lock now fails with a clear error attributing it to the external process, original exception preserved as InnerException.
  • RemoteFileResolver.GetFileInfoAsync no longer rethrows the internal connect-timeout cancellation as a hard failure on slow/unreachable hosts; it falls back to the URL-derived file name as documented.

Added

  • .NET 11 (preview) target (net11.0) for the library, validated by CI on Ubuntu/macOS/Windows.

[5.9.4] - 2026-07-10

Fixed

  • Resume after a failed attempt no longer restarts from 0%: a transient transport error (timeout, dropped connection, 503/504) no longer discards already-downloaded chunk progress when the single-connection fallback engages. A failed attempt now stays resumable from its last position.
  • Silent file corruption when resuming a multi-chunk download against a server that reports no range support: the stale chunk layout is now rebuilt so restarted bytes are written at the correct offsets.
  • Off-by-one in the chunk-completion check that treated a chunk left exactly one byte short as complete, which could fail a download near 100% and make its final byte impossible to resume.

5.9.1 - 2026-07-10

Fixed

  • Release packaging: stop building/pushing an empty symbol package; keep the embedded-PDB symbol-package fix.

5.9.0 - 2026-06-19

Added

  • RemoteFileResolver with GetFileNameAsync(url) and GetFileInfoAsync(url), returning RemoteFileInfo { FileName, FileSize, SupportsRange, Address } from a single header probe — preview a queued download's name and size without starting one.
  • IDownloadService.GetFileInfoAsync(url) exposes the same lookup on the service.

Changed

  • Filename/size/range resolution unified behind SocketClient.GetFileInfoAsync, shared by the download pipeline and RemoteFileResolver. No behavior change to existing downloads.

5.8.1 - 2026-06-16

Fixed

  • Cookie handling for CDN redirects.

5.8.0 - 2026-06-02

Added

  • Fallback to a single connection for downloads on transient transport errors.

5.6.0 - 2026-06-01

Fixed

  • Download cancellation and progress reporting bugs.

5.4.0 - 2026-04-29

Added

  • AOT compilation support for .NET 8 and later.

5.3.0 - 2026-04-25

Fixed

  • URL encoding for square brackets in download paths (#223).

5.2.0 - 2026-04-21

Fixed

  • Servers that reject the Range header with 403/404/503 now fall back to a normal request (#220).

5.1.1 - 2026-04-20

Fixed

  • Maintenance release.

5.1.0 - 2026-03-11

Added

  • Custom HttpClient support, plus related fixes (#219).

5.0.0 - 2026-03-10

Changed

  • Improved resume-download functionality and error handling (#217).

[4.1.1] - 2026-02-10

Fixed

  • Redirected-URL download fix.

[4.1.0] - 2026-02-09

  • Pre-release.

[4.0.3] - 2025-08-09

[4.0.2] - 2025-07-12

[3.3.4] - 2025-03-10

[3.3.0] - 2024-11-20

[3.2.0] - 2024-09-22

Fixed

  • Compiler warnings.

[3.1.2] - 2024-06-30

[3.0.6] - 2023-06-06

[3.0.0-beta] - 2022-10-12

[2.4.1] - 2022-09-21

[2.4.0] - 2022-09-16

For releases and full history, see the GitHub releases and tags.