MyLeasing.Common.csproj

<Project Sdk="Microsoft.NET.Sdk">

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

  <ItemGroup>
    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
    <PackageReference Include="Xam.Plugin.Connectivity" Version="3.2.0" />
    <PackageReference Include="Xam.Plugins.Settings" Version="3.1.1" />
  </ItemGroup>

  <ItemGroup>
    <Reference Include="System.ComponentModel.Annotations">
      <HintPath>C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.netcore.app\2.1.0\ref\netcoreapp2.1\System.ComponentModel.Annotations.dll</HintPath>
    </Reference>
  </ItemGroup>

</Project>