<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>netstandard2.1</TargetFramework> <Nullable>enable</Nullable> </PropertyGroup> <ItemGroup> <PackageReference Include="log4net" Version="2.0.15" /> </ItemGroup> <ItemGroup> <Reference Include="HslCommunication"> <HintPath>..\dll\HslCommunication.dll</HintPath> </Reference> </ItemGroup> </Project>