NetStandardAndNetCoreApp.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFrameworks>$(CurrentTargetFramework);netstandard1.5</TargetFrameworks>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' != 'netstandard1.5'">
    <OutputType>exe</OutputType>
    <DefineConstants>NETCOREAPP;$(DefineConstants)</DefineConstants>
    <AssetTargetFallback>dnxcore50</AssetTargetFallback>
  </PropertyGroup>
  <ItemGroup Condition="'$(TargetFramework)' != 'netstandard1.5'">
    <PackageReference Include="Newtonsoft.Json" Version="$(NewtonsoftJsonPackageVersion)" />
  </ItemGroup>
  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.5'">
    <PackageReference Include="Newtonsoft.Json" Version="$(NewtonsoftJsonPackageVersion)" />
  </ItemGroup>
</Project>