System.Data.DatasetExtensions is not displayed in the Using namespaces list

I installed System.Data.DataSetExtensions NuGet package in my .Net Standard 2.0 Visual Studio 2019 project. However, DataSetExtensions name space is not available in Using System.Data. namespaceslist. I tried to install different versions of System.Data.DataSetExtensions but result was the same.

This is my project file

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup Label="Globals">
    <SccProjectName>%24/MyWebAPI.DataLayer</SccProjectName>
    <SccProvider>{4CA58AB2-18FA-4F8D-95D4-32DDF27D184C}</SccProvider>
    <SccAuxPath>http://tfsServer:8080/tfs/defaultcollection</SccAuxPath>
    <SccLocalPath>.</SccLocalPath>
  </PropertyGroup>

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
    <PackageReference Include="System.Data.Common" Version="4.3.0" />
    <PackageReference Include="System.Data.DataSetExtensions" Version="4.6.0-preview3.19128.7" />
    <PackageReference Include="System.Data.SqlClient" Version="4.4.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\MyWebAPI.BusinessLayer.csproj" />
    <ProjectReference Include="..\MyWebAPI.Interfaces.csproj" />
    <ProjectReference Include="..\MyWebAPI.Logging.csproj" />
  </ItemGroup>
</Project>

Am I doing something wrong? Can anyone please help? Thank you.