Using ANTLR4 C# MSBuild tasks

ANTLR.csproj

<Project Sdk="Microsoft.NET.Sdk">
  
  <ItemGroup>
    <PackageReference Include="Antlr4.Runtime" Version="4.6.4" />
    <PackageReference Include="Antlr4.CodeGenerator" Version="4.6.5-beta001">
      <PrivateAssets>All</PrivateAssets>
    </PackageReference>
  </ItemGroup>
  
  <ItemGroup>
    <Antlr4 Include="Calculator.g4">
      <Generator>MSBuild:Compile</Generator>
      <CustomToolNamespace>Dangl.Calculator.Generated</CustomToolNamespace>
      <Listener>False</Listener>
      <Visitor>True</Visitor>
    </Antlr4>
  </ItemGroup>

  <!-- Use this if you don't want to depend on the Java tool -->
  <PropertyGroup>
    <Antlr4UseCSharpGenerator>True</Antlr4UseCSharpGenerator>
  </PropertyGroup>
  
</Project>