Remove .NET Core 2.1 support, bump up to 1.4.368 (#1645)

* remove .NET  Core 2.1 support
* remove netcoreapp2.1 task from devops pipeline

azure-pipelines.yml

@@ -58,10 +58,6 @@ stages:
       framework: net462
       agents: '@{ windows = "windows-2019" }'
       jobnamesuffix: net462
-  - template: .azurepipelines/test.yml
-    parameters:
-      framework: netcoreapp2.1
-      configuration: Release
   - template: .azurepipelines/test.yml
     parameters:
       configuration: Release

common.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Product>OPC UA .NET Standard Library</Product>
     <RepositoryUrl>https://github.com/OPCFoundation/UA-.NETStandard</RepositoryUrl>
-    <VersionPrefix>1.04.360</VersionPrefix>
+    <VersionPrefix>1.04.368</VersionPrefix>
     <VersionSuffix>preview-$([System.DateTime]::Now.ToString("yyyyMMdd"))</VersionSuffix>
     <Copyright>Copyright © 2004-2021 OPC Foundation, Inc</Copyright>
     <Company>OPC Foundation</Company>

targets.props

@@ -1,29 +1,33 @@
 <Project>
+  <!-- Uncomment to suppress warning that .NET Core 2.1 is used with .NET 6 library. -->
+  <!--
   <PropertyGroup>
     <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
   </PropertyGroup>
+  -->
   <Choose>
-    <!-- Visual Studio 2022 -->
+    <!-- Note: .NET Core 2.x is end of life, removed netcoreapp2.1 from any target. -->
+    <!-- Visual Studio 2022, supports .NET Framework 4.6.2, .NET Core 3.1 and .NET 6 -->
     <When  Condition="'$(VisualStudioVersion)' == '17.0'">
       <PropertyGroup>
         <AppTargetFrameworks>net6.0;netcoreapp3.1;net462</AppTargetFrameworks>
         <AppTargetFramework>net6.0</AppTargetFramework>
-        <TestsTargetFrameworks>net462;netcoreapp2.1;netcoreapp3.1;net6.0</TestsTargetFrameworks>
+        <TestsTargetFrameworks>net462;netcoreapp3.1;net6.0</TestsTargetFrameworks>
         <LibTargetFrameworks>net462;netstandard2.0;netstandard2.1;net6.0</LibTargetFrameworks>
-        <LibxTargetFrameworks>net462;netcoreapp2.1;netstandard2.1;net6.0</LibxTargetFrameworks>
+        <LibxTargetFrameworks>net462;netstandard2.1;net6.0</LibxTargetFrameworks>
       </PropertyGroup>
     </When>
-    <!-- Visual Studio 2019 -->
+    <!-- Visual Studio 2019, supports .NET Framework 4.6.2 and .NET Core 3.1 -->
     <When  Condition="'$(VisualStudioVersion)' == '16.0'">
       <PropertyGroup>
         <AppTargetFrameworks>netcoreapp3.1;net462</AppTargetFrameworks>
         <AppTargetFramework>netcoreapp3.1</AppTargetFramework>
-        <TestsTargetFrameworks>net462;netcoreapp2.1;netcoreapp3.1</TestsTargetFrameworks>
+        <TestsTargetFrameworks>net462;netcoreapp3.1</TestsTargetFrameworks>
         <LibTargetFrameworks>net462;netstandard2.0;netstandard2.1</LibTargetFrameworks>
-        <LibxTargetFrameworks>net462;netcoreapp2.1;netstandard2.1</LibxTargetFrameworks>
+        <LibxTargetFrameworks>net462;netstandard2.1</LibxTargetFrameworks>
       </PropertyGroup>
     </When>
-    <!-- Visual Studio 2017 and earlier, support only .NET framework 4.6.2 because .NET Core 2.x is end of life.-->
+    <!-- Visual Studio 2017 and earlier, support only .NET Framework 4.6.2 because .NET Core 2.x is end of life. -->
     <Otherwise>
       <PropertyGroup>
         <AppTargetFrameworks>net462</AppTargetFrameworks>

version.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://raw.githubusercontent.com/AArnott/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "1.4.367-preview",
+  "version": "1.4.368-preview",
   "versionHeightOffset": 0,
   "nugetPackageVersion": {
     "semVer": 2