Drop netcoreapp2.1 support

netcoreapp2.1 is no longer under LTS support by Microsoft and no one should be using it.

Author: AArnott

azure-pipelines/build_nonWindows.yml

@@ -6,12 +6,20 @@ steps:
     arguments: --no-restore -c $(BuildConfiguration)
 
 - task: DotNetCoreCLI@2
-  displayName: Run MessagePack.Tests (netcoreapp2.1)
+  displayName: Run MessagePack.Tests (netcoreapp3.1)
   inputs:
     command: test
     projects: tests/MessagePack.Tests/MessagePack.Tests.csproj
-    arguments: --no-build -c $(BuildConfiguration) -f netcoreapp2.1 -v n --settings "$(Build.Repository.LocalPath)/azure-pipelines/$(Agent.OS).runsettings"
-    testRunTitle: netcoreapp2.1-$(Agent.JobName)
+    arguments: --no-build -c $(BuildConfiguration) -f netcoreapp3.1 -v n --settings "$(Build.Repository.LocalPath)/azure-pipelines/$(Agent.OS).runsettings"
+    testRunTitle: netcoreapp3.1-$(Agent.JobName)
+
+- task: DotNetCoreCLI@2
+  displayName: Run MessagePack.Tests (net5.0)
+  inputs:
+    command: test
+    projects: tests/MessagePack.Tests/MessagePack.Tests.csproj
+    arguments: --no-build -c $(BuildConfiguration) -f net5.0 -v n --settings "$(Build.Repository.LocalPath)/azure-pipelines/$(Agent.OS).runsettings"
+    testRunTitle: net5.0-$(Agent.JobName)
 
 - bash: mono ~/.nuget/packages/xunit.runner.console/2.4.1/tools/net472/xunit.console.exe bin/MessagePack.Tests/$(BuildConfiguration)/net472/MessagePack.Tests.dll -html $(BUILD.ARTIFACTSTAGINGDIRECTORY)/build_logs/mono_testrun.html
   displayName: Run MessagePack.Tests (mono)

sandbox/MessagePack.Internal/MessagePack.Internal.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <DefineConstants>$(DefineConstants);SPAN_BUILTIN;MESSAGEPACK_INTERNAL</DefineConstants>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <CheckForOverflowUnderflow>True</CheckForOverflowUnderflow>

sandbox/PerfBenchmarkDotNet/PerfBenchmarkDotNet.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net472;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>net472;net5.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
   </PropertyGroup>

sandbox/PerfNetFramework/PerfNetFramework.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net472;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>net472;net5.0</TargetFrameworks>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
   </PropertyGroup>
   <ItemGroup>

sandbox/Sandbox/Sandbox.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
   </PropertyGroup>
 

src/MessagePack/MessagePack.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp2.1;netcoreapp3.1;net5.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netcoreapp3.1;net5.0</TargetFrameworks>
     <NoWarn>$(NoWarn);CS0649</NoWarn>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <DefineConstants Condition=" '$(TargetFramework)' != 'netstandard2.0' ">$(DefineConstants);SPAN_BUILTIN</DefineConstants>
@@ -35,7 +35,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="3.3.2" PrivateAssets="all" />
   </ItemGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'netcoreapp2.1' ">
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0" />
     <PackageReference Include="System.Collections.Immutable" Version="1.5.0" />
     <PackageReference Include="System.Reflection.Emit" Version="4.6.0" />

tests/MessagePack.AspNetCoreMvcFormatter.Tests/MessagePack.AspNetCoreMvcFormatter.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
     <CodeAnalysisRuleSet>..\MessagePack.Tests\MessagePack.Tests.ruleset</CodeAnalysisRuleSet>

tests/MessagePack.Internal.Tests/MessagePack.Internal.Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
     <CodeAnalysisRuleSet>..\MessagePack.Tests\MessagePack.Tests.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
 

tests/MessagePack.Tests/MessagePack.Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net472;netcoreapp2.1;netcoreapp3.1;net5.0</TargetFrameworks>
+    <TargetFrameworks>net472;netcoreapp3.1;net5.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>9.0</LangVersion>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>