NUGET LIBRARY
System.Collections.Immutable
Official package-registry history. This page does not infer support or EOL from release activity.
- Versions indexed
- 123
- Latest version activity
- 9.0.20
- Latest registry signal
- Published
- Last synchronized
- 3 Oct 2026
Authoritative registry
Version entries link to the official registry catalogue event that supplied the record.
Open package on NuGet ↗Lifecycle interpretation
Publication or deletion in a package registry is a distribution signal, not a promise of maintenance or security support. Any verified publisher EOL boundary remains in the main lifecycle catalogue.
Package-version activity
Newest official registry events first.
| Version | Registry event | Signal | Release notes | Evidence |
|---|---|---|---|---|
| 9.0.20 | 8 Sep 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.12 | 8 Sep 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-rc.1.26425.128 | 8 Sep 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.11 | 11 Aug 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.19 | 11 Aug 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.7.26381.103 | 11 Aug 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.10 | 14 Jul 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.18 | 14 Jul 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.6.26359.118 | 14 Jul 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.9 | 9 Jun 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.17 | 9 Jun 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.5.26302.115 | 9 Jun 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.8 | 12 May 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.16 | 12 May 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.4.26230.115 | 12 May 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.1 | 21 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0 | 21 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.7 | 21 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.15 | 14 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.6 | 14 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.3.26207.106 | 14 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.5 | 10 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.7.0-preview3.19551.4 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.2.21154.6 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.3.0 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.32-beta | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-rc1.19456.4 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview6.19264.9 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.5.0 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.5.0-rc1 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.7.21377.19 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview5.19224.8 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.5.0-preview2-26406-04 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview9.19416.11 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.7.0-preview2.19523.17 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.38-beta-23225 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.2.20160.6 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.38-beta-23409 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.33-beta | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview6.19303.8 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.7.1 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview9.19421.4 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.3.0-preview1-24530-04 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.2.0 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.5.21301.5 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.36 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.38-beta-23516 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-rc.1.21451.13 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-rc.2.20475.5 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.4.20251.6 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.3.1 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.4.0-preview2-25405-01 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.7.0-preview1.19504.10 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.2.0-rc2-24027 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.6.21352.12 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.6.20305.6 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.4.21253.7 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.4.0 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.34-rc | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.4.0-preview1-25305-02 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview.19073.11 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.37 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview3.19128.7 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview.18571.3 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.3.21201.4 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.5.0-preview1-26216-02 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview4.19212.13 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview7.19362.9 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-preview.1.21102.12 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.7.0 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.37-beta-23019 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 6.0.0-rc.2.21480.5 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.5.20278.1 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.6.0-preview8.19405.3 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.1.20120.5 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.7.20364.11 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.8.20407.11 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-preview.3.20214.6 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 1.1.37-beta-23109 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 5.0.0-rc.1.20451.14 | 9 Apr 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.2.26159.112 | 10 Mar 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.14 | 10 Mar 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.4 | 10 Mar 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 11.0.0-preview.1.26104.118 | 10 Feb 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.13 | 10 Feb 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.3 | 10 Feb 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.2 | 13 Jan 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.12 | 13 Jan 2026 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.1 | 9 Dec 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.0 | 11 Nov 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.11 | 11 Nov 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.0-rc.2.25502.107 | 14 Oct 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.10 | 14 Oct 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.9 | 9 Sep 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.0-rc.1.25451.107 | 9 Sep 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.0-preview.7.25380.108 | 12 Aug 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.8 | 5 Aug 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 10.0.0-preview.6.25358.103 | 15 Jul 2025 | PUBLISHED | Not checked yet | Official event ↗ |
| 9.0.7 | 8 Jul 2025 | PUBLISHED | Not checked yet | Official event ↗ |