Move to .NET 3.0 and C# 8.0 (#4097)

appveyor.yml

@@ -4,6 +4,8 @@ test: off
 environment:
     DOTNET_CLI_TELEMETRY_OPTOUT: true
     DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
+install:
+    - cmd: choco install dotnetcore-sdk --version 3.0.100
 build_script:
     - cmd: build.bat canary
 

azure-pipelines.yml

@@ -3,6 +3,9 @@ jobs:
   pool:
     vmImage: 'ubuntu-16.04'
   steps:
+  - task: UseDotNet@2
+    inputs:
+        version: '3.0.100'
   - script: ./build.sh test-one
     displayName: 'build and unit test'
   - task: PublishTestResults@2
@@ -15,6 +18,9 @@ jobs:
   pool:
     vmImage: 'vs2017-win2016'
   steps:
+  - task: UseDotNet@2
+    inputs:
+      version: '3.0.100'
   - script: build.bat canary
     displayName: 'build and unit test'
   - task: PublishTestResults@2
@@ -49,6 +55,9 @@ jobs:
       es601:
         esVersion: '6.0.1'
   steps:
+      - task: UseDotNet@2
+        inputs:
+            version: '3.0.100'
       - script: 'build.bat integrate-one $(esVersion) "readonly,writable,bool,xpack"'
         displayName: '$(esVersion) windows integration tests'
       - task: PublishTestResults@2
@@ -84,6 +93,9 @@ jobs:
       es601:
         esVersion: '6.0.1'
   steps:
+      - task: UseDotNet@2
+        inputs:
+            version: '3.0.100'
       - script: './build.sh integrate-one $(esVersion) "readonly,writable"'
         displayName: '$(esVersion) linux integration tests'
       - task: PublishTestResults@2

build/scripts/Benchmarking.fs

@@ -14,7 +14,7 @@ module Benchmarker =
         let password = match args.CommandArguments with | Benchmark b -> b.Password | _ -> None
         let runInteractive = not args.NonInteractive
         let credentials  = (username, password)
-        let runCommandPrefix = "run -f netcoreapp2.1 -c Release"
+        let runCommandPrefix = "run -f netcoreapp3.0 -c Release"
         let runCommand =
             match (runInteractive, url, credentials) with
             | (false, Some url, (Some username, Some password)) -> sprintf "%s -- --all \"%s\" \"%s\" \"%s\"" runCommandPrefix url username password

build/scripts/Cluster.fs

@@ -12,7 +12,7 @@ module Cluster =
         let clusterName = Option.defaultValue "" <| match args.CommandArguments with | Cluster c -> Some c.Name | _ -> None
         let clusterVersion = Option.defaultValue "" <|match args.CommandArguments with | Cluster c -> c.Version | _ -> None
 
-        let testsProjectDirectory = Path.Combine(Path.GetFullPath(Paths.Output("Tests.ClusterLauncher")), "netcoreapp2.1")
+        let testsProjectDirectory = Path.Combine(Path.GetFullPath(Paths.Output("Tests.ClusterLauncher")), "netcoreapp3.0")
         let tempDir = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
 
         let sourceDir = Paths.Source("Tests/Tests.Configuration");

build/scripts/Differ.fs

@@ -9,6 +9,8 @@ open Commandline
 module Differ =
 
     let Run args =
+       Tooling.DotNet.Exec ["tool"; "restore"]
+
        let differ = "assembly-differ"
        let args = args.RemainingArguments |> String.concat " "
        let command = sprintf @"%s %s -o ../../%s" differ args Paths.BuildOutput

build/scripts/Documentation.fs

@@ -11,7 +11,7 @@ module Documentation =
 
     let Generate args = 
         let docGenerator = PrivateProject(DocGenerator)
-        let path = Paths.ProjectOutputFolder docGenerator DotNetFramework.NetCoreApp2_1
+        let path = Paths.ProjectOutputFolder docGenerator DotNetFramework.NetCoreApp3_0
         let generator = sprintf "%s.dll" docGenerator.Name
 
         let (|NotNullOrEmpty|_|) (candidate:string) =

build/scripts/Projects.fs

@@ -7,13 +7,13 @@ module Projects =
     type DotNetFramework = 
         | NetStandard2_0
         | Net461
-        | NetCoreApp2_1
+        | NetCoreApp3_0
         static member All = [NetStandard2_0; Net461]
-        static member AllTests = [NetCoreApp2_1; Net461] 
+        static member AllTests = [NetCoreApp3_0; Net461] 
         member this.Identifier = 
             match this with
             | NetStandard2_0 -> { MSBuild = "netstandard2.0"; Nuget = "netstandard2.0"; DefineConstants = ""; }
-            | NetCoreApp2_1 -> { MSBuild = "netcoreapp2.1"; Nuget = "netcoreapp2.1"; DefineConstants = ""; }
+            | NetCoreApp3_0 -> { MSBuild = "netcoreapp3.0"; Nuget = "netcoreapp3.0"; DefineConstants = ""; }
             | Net461 -> { MSBuild = "net461"; Nuget = "net461"; DefineConstants = ""; }
 
     type Project =

build/scripts/ShadowDependencies.fs

@@ -8,6 +8,9 @@ module ShadowDependencies =
     let private assemblyRewriter = "assembly-rewriter"
     let private keyFile = Paths.Keys "keypair.snk"
     let Rewrite majorVersion framework projects =
+
+        Tooling.DotNet.Exec ["tool"; "restore"]
+
         let project = projects |> Seq.head
         let folder = Paths.ProjectOutputFolder project framework
 

build/scripts/Testing.fs

@@ -41,7 +41,7 @@ module Tests =
             let p = ["test"; "."; "-c"; "RELEASE"]
             //make sure we only test netcoreapp on linux or requested on the command line to only test-one
             match (target, Environment.isLinux) with 
-            | (_, true) -> ["--framework"; "netcoreapp2.1"] |> List.append p
+            | (_, true) -> ["--framework"; "netcoreapp3.0"] |> List.append p
             | (Commandline.MultiTarget.One, _) ->
                 let random = new Random()
                 let fw = DotNetFramework.AllTests |> List.sortBy (fun _ -> random.Next()) |> List.head

build/scripts/Tooling.fs

@@ -58,9 +58,9 @@ module Tooling =
         member this.ExecIn workingDirectory arguments = this.ExecInWithTimeout workingDirectory arguments timeout
         member this.Exec arguments = this.ExecWithTimeout arguments timeout
 
-    let nugetFile = Path.GetFullPath "build/scripts/bin/Release/netcoreapp2.2/NuGet.exe" 
+    let nugetFile = Path.GetFullPath "build/scripts/bin/Release/netcoreapp3.0/NuGet.exe" 
     let Nuget = BuildTooling(None, nugetFile)
-    let ILRepack = BuildTooling(None, "build/scripts/bin/Release/netcoreapp2.2/ILRepack.exe")
+    let ILRepack = BuildTooling(None, "build/scripts/bin/Release/netcoreapp3.0/ILRepack.exe")
     let DotNet = BuildTooling(Some <| TimeSpan.FromMinutes(5.), "dotnet")
 
 

build/scripts/scripts.fsproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <!-- Type Providers are restored using net461, fine for netcoreapp2.2 so we kill the warning -->
     <NoWarn>$(NoWarn);NU1701</NoWarn>
@@ -27,47 +27,9 @@
     <Content Include="..\..\build.sh"><Link>build.sh</Link></Content>
     <Content Include="..\..\build.bat"><Link>build.bat</Link></Content>
   </ItemGroup>
-  <!-- Type providers currently can't run inside the .NET Core 2.0 hosted compiler, see https://github.com/Microsoft/visualfsharp/pull/3658#issuecomment-334773415 -->
-  <PropertyGroup>
-    <IsWindows Condition="'$(OS)' == 'Windows_NT'">true</IsWindows>
-    <IsOSX Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::OSX)))' == 'true'">true</IsOSX>
-    <IsLinux Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Linux)))' == 'true'">true</IsLinux>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsWindows)' == 'true' AND Exists('C:\Program Files (x86)\Microsoft SDKs\F#\4.1\Framework\v4.0\fsc.exe')">
-    <FscToolPath>C:\Program Files (x86)\Microsoft SDKs\F#\4.1\Framework\v4.0</FscToolPath>
-    <FscToolExe>fsc.exe</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsWindows)' == 'true' AND Exists('C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\IDE\CommonExtensions\Microsoft\FSharp\fsc.exe')">
-    <FscToolPath>C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\IDE\CommonExtensions\Microsoft\FSharp</FscToolPath>
-    <FscToolExe>fsc.exe</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsWindows)' == 'true' AND Exists('C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\CommonExtensions\Microsoft\FSharp\fsc.exe')">
-    <FscToolPath>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\CommonExtensions\Microsoft\FSharp</FscToolPath>
-    <FscToolExe>fsc.exe</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsWindows)' == 'true' AND Exists('C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\FSharp\fsc.exe')">
-    <FscToolPath>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\FSharp</FscToolPath>
-    <FscToolExe>fsc.exe</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsWindows)' == 'true' AND Exists('C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\CommonExtensions\Microsoft\FSharp\fsc.exe')">
-    <FscToolPath>C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\CommonExtensions\Microsoft\FSharp</FscToolPath>
-    <FscToolExe>fsc.exe</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsWindows)' == 'true' AND Exists('C:\Program Files (x86)\Microsoft SDKs\F#\10.1\Framework\v4.0\fsc.exe')">
-    <FscToolPath>C:\Program Files (x86)\Microsoft SDKs\F#\10.1\Framework\v4.0</FscToolPath>
-    <FscToolExe>fsc.exe</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsOSX)' == 'true'  AND Exists('/Library/Frameworks/Mono.framework/Versions/Current/Commands/fsharpc')">
-    <FscToolPath>/Library/Frameworks/Mono.framework/Versions/Current/Commands</FscToolPath>
-    <FscToolExe>fsharpc</FscToolExe>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(IsLinux)' == 'true' AND Exists('/usr/bin/fsharpc')">
-    <FscToolPath>/usr/bin</FscToolPath>
-    <FscToolExe>fsharpc</FscToolExe>
-  </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Bullseye" Version="3.0.0-rc.1" />
-    <PackageReference Include="Elastic.Managed" Version="0.1.0-ci20190724T022011" />
+    <PackageReference Include="Elastic.Managed" Version="0.1.0-ci20190927T121631" />
     <PackageReference Include="Fake.Core.Environment" Version="5.15.0" />
     <PackageReference Include="Fake.Core.SemVer" Version="5.15.0" />
     <PackageReference Include="Fake.IO.FileSystem" Version="5.15.0" />
@@ -78,10 +40,6 @@
     <PackageReference Include="NuGet.CommandLine" Version="4.9.4" />
     <PackageReference Include="Octokit" Version="0.32.0" />
     <PackageReference Include="Proc" Version="0.6.1" />
-
-    <DotNetCliToolReference Include="dotnet-assembly-rewriter" Version="1.0.0-alpha20190401T093210" />
-    <DotNetCliToolReference Include="dotnet-assembly-differ" Version="1.0.0-alpha20190403T095656" />
-
   </ItemGroup>
   <Target Name="CopyToolPackages" AfterTargets="Build">
     <Copy SourceFiles="$(PkgILRepack)\tools\ILRepack.exe" DestinationFolder="$(OutDir)" />

dotnet-tools.json

@@ -0,0 +1,18 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-assembly-rewriter": {
+      "version": "1.0.0-ci20190926102235",
+      "commands": [
+        "assembly-rewriter"
+      ]
+    },
+    "dotnet-assembly-differ": {
+      "version": "1.0.0-ci20190926135713",
+      "commands": [
+        "assembly-differ"
+      ]
+    }
+  }
+}

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "2.2.103"
+    "version": "3.0.100"
   },
   "version": "6.8.2"
 }

src/CodeGeneration/ApiGenerator/ApiGenerator.csproj

@@ -3,7 +3,7 @@
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\Artifacts.build.props" />
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <VersionPrefix>6.0.0</VersionPrefix>
     <VersionSuffix>alpha</VersionSuffix>
     <NoWarn>NU1701</NoWarn>

src/CodeGeneration/DocGenerator/AsciiDoc/GeneratedAsciidocVisitor.cs

@@ -230,7 +230,7 @@ public override void VisitAttributeEntry(AttributeEntry attributeEntry)
 			string configuration = null;
 			if (Program.BuildOutputPath.Contains("src"))
 			{
-				//bin/Debug|Release/netcoreapp2.1
+				//bin/Debug|Release/netcoreapp3.0
 				configuration = new DirectoryInfo(Path.GetDirectoryName(Assembly.GetEntryAssembly().Location)).Parent?.Name;
 				return;
 			}

src/CodeGeneration/DocGenerator/DocGenerator.csproj

@@ -3,7 +3,7 @@
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\Artifacts.build.props" />
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <VersionPrefix>6.0.0</VersionPrefix>
     <VersionSuffix>alpha</VersionSuffix>
     <NoWarn>NU1701,NU1605</NoWarn>

src/CodeGeneration/DocGenerator/Program.cs

@@ -35,8 +35,9 @@ string P(string path)
 			}
 
 			var globalJsonVersion = string.Join(".", Regex.Matches(File.ReadAllText(globalJson), "\"version\": \"(.*)\"")
-										 .Last().Groups
-										 .Last().Value
+										 .Last()
+										 .Groups[^1]
+										 .Value
 										 .Split(".")
 										 .Take(2));
 

src/Directory.Build.props

@@ -1,5 +1,7 @@
 <Project>
 	<PropertyGroup>
-		<LangVersion>latest</LangVersion>
+		<LangVersion>8.0</LangVersion>
+    <!-- We'll work on a project by project approach to enable this -->
+<!--    <Nullable>enable</Nullable>-->
 	</PropertyGroup>
 </Project>

src/Elasticsearch.Net/ElasticLowLevelClient.cs

@@ -65,7 +65,7 @@ private TRequestParams _params<TRequestParams>(TRequestParams requestParams, str
 		{
 			if (contentType.IsNullOrEmpty()) return requestParams;
 
-			requestParams = requestParams ?? new TRequestParams();
+			requestParams ??= new TRequestParams();
 			//The properties are set here on RequestConfiguration here because they are not nullable (fixed in master).
 			if (requestParams.RequestConfiguration == null)
 				requestParams.RequestConfiguration = new RequestConfiguration

src/Elasticsearch.Net/Elasticsearch.Net.csproj

@@ -2,8 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\PublishArtifacts.build.props" />
   <PropertyGroup>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">netstandard2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.3.0" />

src/Library.build.props

@@ -13,9 +13,14 @@
 		<!-- File version reflects actual version number without prelease since that not allowed in its struct -->
 		<FileVersion>$(CurrentAssemblyFileVersion)</FileVersion>
 
+    <DefineConstants Condition="'$(TargetFramework)'=='net461'">$(DefineConstants);FULLFRAMEWORK</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)'=='net472'">$(DefineConstants);FULLFRAMEWORK</DefineConstants>
 		<DefineConstants Condition="'$(TargetFramework)'=='netstandard2.0'">$(DefineConstants);DOTNETCORE</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)'=='netstandard2.1'">$(DefineConstants);DOTNETCORE</DefineConstants>
 		<DefineConstants Condition="'$(TargetFramework)'=='netcoreapp2.0'">$(DefineConstants);DOTNETCORE</DefineConstants>
 		<DefineConstants Condition="'$(TargetFramework)'=='netcoreapp2.1'">$(DefineConstants);DOTNETCORE</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)'=='netcoreapp2.2'">$(DefineConstants);DOTNETCORE</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)'=='netcoreapp3.0'">$(DefineConstants);DOTNETCORE</DefineConstants>
 
 		<RepoUri>https://raw.githubusercontent.com/elastic/elasticsearch-net</RepoUri>
 		<Authors>Elasticsearch BV</Authors>
@@ -25,6 +30,9 @@
 		<ReleaseNotes>See https://github.com/elastic/elasticsearch-net/releases</ReleaseNotes>
 		<PackageIconUrl>https://raw.githubusercontent.com/elastic/elasticsearch-net/master/build/nuget-icon.png</PackageIconUrl>
 
-		<LangVersion>latest</LangVersion>
 	</PropertyGroup>
+  <ItemGroup>
+    <PackageReference Condition="'$(OS)' != 'Windows_NT' and '$(TargetFramework)'=='net461'" Include="Microsoft.NETFramework.ReferenceAssemblies" PrivateAssets="All" Version="1.0.0-preview.2" />
+    <PackageReference Condition="'$(OS)' != 'Windows_NT' and '$(TargetFramework)'=='net472'" Include="Microsoft.NETFramework.ReferenceAssemblies" PrivateAssets="All" Version="1.0.0-preview.2" />
+  </ItemGroup>
 </Project>

src/Nest/Nest.csproj

@@ -2,9 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\PublishArtifacts.build.props" />
   <PropertyGroup>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">netstandard2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">netstandard2.0</TargetFrameworks>
-    <LangVersion>latest</LangVersion>
+    <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Elasticsearch.Net\Elasticsearch.Net.csproj" />

src/PublishArtifacts.build.props

@@ -14,7 +14,6 @@
     <Prefer32Bit>false</Prefer32Bit>
     <DebugSymbols>true</DebugSymbols>
     <DebugType>portable</DebugType>
-    <LangVersion>latest</LangVersion>
 
     <DoSourceLink></DoSourceLink>
     <SourceLink Condition="'$(DoSourceLink)'!=''">$(BaseIntermediateOutputPath)\sl-$(MsBuildProjectName)-$(TargetFramework).json</SourceLink>

src/Serializers/Nest.JsonNetSerializer/Nest.JsonNetSerializer.csproj

@@ -2,8 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\PublishArtifacts.build.props" />
   <PropertyGroup>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">netstandard2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\Nest\Nest.csproj" />

src/Tests/Directory.Build.props

@@ -2,6 +2,7 @@
 	<Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
 	<PropertyGroup Condition="'$(TestPackageVersion)'!=''">
 		<RestoreSources>../../../build/output/_packages;https://api.nuget.org/v3/index.json</RestoreSources>
+    <LangVersion>8.0</LangVersion>
 	</PropertyGroup>
 	<PropertyGroup>
 		<SignAssembly>true</SignAssembly>

src/Tests/Tests.Benchmarking/Tests.Benchmarking.csproj

@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\Artifacts.build.props" />
   <PropertyGroup>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">netcoreapp2.1;net461</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.0;net472</TargetFrameworks>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
@@ -13,7 +12,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.11.5" />
-    <PackageReference Include="Elastic.BenchmarkDotNetExporter" Version="0.1.0-ci20190724T022011" />
+    <PackageReference Include="Elastic.BenchmarkDotNetExporter" Version="0.1.0-ci20190927T121631" />
     <PackageReference Include="LibGit2Sharp" Version="0.26.0-preview-0062" />
   </ItemGroup>
 </Project>

src/Tests/Tests.ClusterLauncher/Tests.ClusterLauncher.csproj

@@ -2,7 +2,7 @@
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), build.bat))\src\Artifacts.build.props" />
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Tests.Core\Tests.Core.csproj" />