Update CHANGELOG for v1.8.1.9

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,5 +1,26 @@
 # Changelog
 
+## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/System.Net/tree/HEAD)
+
+[Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.8.1...HEAD)
+
+**Implemented enhancements:**
+
+- Improve network helper [\#256](https://github.com/nanoframework/System.Net/pull/256)
+
+**Documentation and other chores:**
+
+- Update 1 NuGet dependencies [\#255](https://github.com/nanoframework/System.Net/pull/255)
+- Update 1 NuGet dependencies [\#254](https://github.com/nanoframework/System.Net/pull/254)
+
+## [v1.8.1](https://github.com/nanoframework/System.Net/tree/v1.8.1) (2022-03-28)
+
+[Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.8.1-preview.5...v1.8.1)
+
+**Documentation and other chores:**
+
+- release-v1.8.1 [\#253](https://github.com/nanoframework/System.Net/pull/253)
+
 ## [v1.8.1-preview.5](https://github.com/nanoframework/System.Net/tree/v1.8.1-preview.5) (2022-03-28)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.8.1-preview.3...v1.8.1-preview.5)
@@ -228,6 +249,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.7.1-preview.23...v1.7.1)
 
+**Documentation and other chores:**
+
+- release-v1.7.1 [\#213](https://github.com/nanoframework/System.Net/pull/213)
+
 ## [v1.7.1-preview.23](https://github.com/nanoframework/System.Net/tree/v1.7.1-preview.23) (2021-12-02)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.7.1-preview.21...v1.7.1-preview.23)
@@ -301,6 +326,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.7.0-preview.10...v1.7.0)
 
+**Documentation and other chores:**
+
+- release-v1.7.0 [\#200](https://github.com/nanoframework/System.Net/pull/200)
+
 ## [v1.7.0-preview.10](https://github.com/nanoframework/System.Net/tree/v1.7.0-preview.10) (2021-07-15)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.7.0-preview.8...v1.7.0-preview.10)
@@ -635,6 +664,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.6.1-preview.4...v1.6.1)
 
+**Documentation and other chores:**
+
+- Release release-v1.6.1 [\#135](https://github.com/nanoframework/System.Net/pull/135)
+
 ## [v1.6.1-preview.4](https://github.com/nanoframework/System.Net/tree/v1.6.1-preview.4) (2020-06-16)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.6.0...v1.6.1-preview.4)
@@ -647,6 +680,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.6.1-preview.2...v1.6.0)
 
+**Documentation and other chores:**
+
+- Release release-v1.6.0 [\#133](https://github.com/nanoframework/System.Net/pull/133)
+
 ## [v1.6.1-preview.2](https://github.com/nanoframework/System.Net/tree/v1.6.1-preview.2) (2020-06-16)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.6.0-preview.6...v1.6.1-preview.2)
@@ -663,6 +700,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.5.0-preview.7...v1.5.0)
 
+**Documentation and other chores:**
+
+- Release release-v1.5.0 [\#131](https://github.com/nanoframework/System.Net/pull/131)
+
 ## [v1.5.0-preview.7](https://github.com/nanoframework/System.Net/tree/v1.5.0-preview.7) (2020-06-12)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.5.0-preview.2...v1.5.0-preview.7)
@@ -848,6 +889,11 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.3.0-preview.4...v1.3.0)
 
+**Documentation and other chores:**
+
+- Release release-v1.3.0 [\#101](https://github.com/nanoframework/System.Net/pull/101)
+- Update 2 NuGet dependencies [\#96](https://github.com/nanoframework/System.Net/pull/96)
+
 ## [v1.3.0-preview.4](https://github.com/nanoframework/System.Net/tree/v1.3.0-preview.4) (2019-10-17)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.2.2...v1.3.0-preview.4)
@@ -860,6 +906,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.2.2-preview.8...v1.2.2)
 
+**Documentation and other chores:**
+
+- Release v1.2.2 [\#95](https://github.com/nanoframework/System.Net/pull/95)
+
 ## [v1.2.2-preview.8](https://github.com/nanoframework/System.Net/tree/v1.2.2-preview.8) (2019-10-15)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.2.2-preview.7...v1.2.2-preview.8)
@@ -1063,12 +1113,16 @@
 **Documentation and other chores:**
 
 - Bumps nanoFramework.Runtime.Events from 1.0.4 to 1.0.5-preview-003 [\#61](https://github.com/nanoframework/System.Net/pull/61)
-- Update 2 NuGet dependencies [\#59](https://github.com/nanoframework/System.Net/pull/59)
 
 ## [v1.0.4](https://github.com/nanoframework/System.Net/tree/v1.0.4) (2019-01-22)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.0.3-preview-003...v1.0.4)
 
+**Documentation and other chores:**
+
+- Release v1.0.4 [\#60](https://github.com/nanoframework/System.Net/pull/60)
+- Update 2 NuGet dependencies [\#59](https://github.com/nanoframework/System.Net/pull/59)
+
 ## [v1.0.3-preview-003](https://github.com/nanoframework/System.Net/tree/v1.0.3-preview-003) (2019-01-03)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.0.2...v1.0.3-preview-003)
@@ -1080,12 +1134,16 @@
 **Documentation and other chores:**
 
 - Merge back from Release v1.0.2 [\#58](https://github.com/nanoframework/System.Net/pull/58)
-- Update 2 NuGet dependencies [\#56](https://github.com/nanoframework/System.Net/pull/56)
 
 ## [v1.0.2](https://github.com/nanoframework/System.Net/tree/v1.0.2) (2018-12-15)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.0.2-preview-028...v1.0.2)
 
+**Documentation and other chores:**
+
+- Release v1.0.2 [\#57](https://github.com/nanoframework/System.Net/pull/57)
+- Update 2 NuGet dependencies [\#56](https://github.com/nanoframework/System.Net/pull/56)
+
 ## [v1.0.2-preview-028](https://github.com/nanoframework/System.Net/tree/v1.0.2-preview-028) (2018-12-13)
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.0.2-preview-023...v1.0.2-preview-028)
@@ -1124,6 +1182,10 @@
 
 [Full Changelog](https://github.com/nanoframework/System.Net/compare/v1.0.0...v1.0.2-preview-001)
 
+## [v1.0.0](https://github.com/nanoframework/System.Net/tree/v1.0.0) (2018-10-17)
+
+[Full Changelog](https://github.com/nanoframework/System.Net/compare/8fa2d6800a15f8ea79c6ef141cdec7300d2269ac...v1.0.0)
+
 **Implemented enhancements:**
 
 - Update snk to match mscorlib [\#18](https://github.com/nanoframework/System.Net/pull/18)
@@ -1138,17 +1200,15 @@
 
 **Documentation and other chores:**
 
+- Merge 'develop' for Release 1.0.0 [\#39](https://github.com/nanoframework/System.Net/pull/39)
+- Update 2 NuGet dependencies [\#38](https://github.com/nanoframework/System.Net/pull/38)
 - Update 2 NuGet dependencies [\#34](https://github.com/nanoframework/System.Net/pull/34)
 - Update 2 NuGet dependencies [\#32](https://github.com/nanoframework/System.Net/pull/32)
 - Update 2 NuGet dependencies [\#31](https://github.com/nanoframework/System.Net/pull/31)
 - Bump nanoFramework.Runtime.Events from 1.0.0-preview188 to 1.0.0-preview191 in /source [\#19](https://github.com/nanoframework/System.Net/pull/19)
 - Bump nanoFramework.CoreLibrary and nanoFramework.Runtime.Events in /source [\#16](https://github.com/nanoframework/System.Net/pull/16)
 - Update Nuget packages [\#1](https://github.com/nanoframework/System.Net/pull/1)
 
-## [v1.0.0](https://github.com/nanoframework/System.Net/tree/v1.0.0) (2018-10-17)
-
-[Full Changelog](https://github.com/nanoframework/System.Net/compare/8fa2d6800a15f8ea79c6ef141cdec7300d2269ac...v1.0.0)
-
 
 
 \* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*