.net standard old csproj, migrate to packageReference

Question

I want to migrate packages.config to packagesReference. I have solution consisting of 46 projects, For ASP.NET it's not possible to migrate whole .SLN so we need to go one project by one using this workaround -> packageReference issue for asp.net

I have succeed. But when I try to build this project, I'm getting multiple errors like below:

The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)

Seems like project doesn't see included NuGets. Maybe we need to upgrade it to new csproj? It's still in old 2013/2015 version.

First property Group looks like this:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProductVersion>
    </ProductVersion>
    <SchemaVersion>2.0</SchemaVersion>
    <RestoreProjectStyle>PackageReference</RestoreProjectStyle>
    <ProjectGuid>{C186BDC8-3606-4C75-B807-3389C0160030}</ProjectGuid>
    <ProjectTypeGuids>{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>
    <OutputType>Library</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>ProjectName</RootNamespace>
    <AssemblyName>ProjectName</AssemblyName>
    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
    <MvcBuildViews>false</MvcBuildViews>
    <UseIISExpress>true</UseIISExpress>
    <IISExpressSSLPort />
    <IISExpressAnonymousAuthentication />
    <IISExpressWindowsAuthentication />
    <IISExpressUseClassicPipelineMode />
    <SccProjectName>SAK</SccProjectName>
    <SccLocalPath>SAK</SccLocalPath>
    <SccAuxPath>SAK</SccAuxPath>
    <SccProvider>SAK</SccProvider>
    <UseGlobalApplicationHostFile />
    <Use64BitIISExpress />
    <TargetFrameworkProfile />
    <NuGetPackageImportStamp>
    </NuGetPackageImportStamp>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <DocumentationFile>
    </DocumentationFile>
    <ExcludeGeneratedDebugSymbol>false</ExcludeGeneratedDebugSymbol>
    <LangVersion>latest</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <DocumentationFile>content\doc\api-doc.xml</DocumentationFile>
    <ExcludeGeneratedDebugSymbol>false</ExcludeGeneratedDebugSymbol>
    <FilesToIncludeForPublish>AllFilesInTheProject</FilesToIncludeForPublish>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="CSharpSDK, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
      <SpecificVersion>False</SpecificVersion>
      <HintPath>..\..\Core\Libs\CSharpSDK.dll</HintPath>
    </Reference>
    <Reference Include="Microsoft.CSharp" />
    <Reference Include="System" />
    <Reference Include="System.ComponentModel.Composition" />
    <Reference Include="System.Data" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="System.Data.OracleClient" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.IdentityModel" />
    <Reference Include="System.identitymodel.services" />
    <Reference Include="System.IO.Compression" />
    <Reference Include="System.Net" />
    <Reference Include="System.Numerics" />
    <Reference Include="System.Runtime.Caching" />
    <Reference Include="System.Security" />
    <Reference Include="System.ServiceModel" />
    <Reference Include="System.ServiceProcess" />
    <Reference Include="System.Transactions" />
    <Reference Include="System.Web.DynamicData" />
    <Reference Include="System.Web.Entity" />
    <Reference Include="System.Web.ApplicationServices" />
    <Reference Include="System.ComponentModel.DataAnnotations" />
    <Reference Include="System.Web.Extensions" />
    <Reference Include="System.Web" />
    <Reference Include="System.Web.Abstractions" />
    <Reference Include="System.Web.Routing" />
    <Reference Include="System.Windows.Forms" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Configuration" />
    <Reference Include="System.Runtime.Serialization" />
    <Reference Include="System.Net.Http.WebRequest">
    </Reference>
    <Reference Include="System.Xml.Linq" />
    <Reference Include="WindowsBase" />
  </ItemGroup>

Next item group is ProjectReference and other controller,content etc.

Thanks, Rafal