Using Selenium WebDriver in library csproj with .NET Core

From what I understand you have an API project that depends on a Scraping project.

Scraping.csproj:

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

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>  
    <LangVersion>7.2</LangVersion>
    <PublishChromeDriver>true</PublishChromeDriver>    
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Selenium.WebDriver" Version="3.141.0" />
    <PackageReference Include="Selenium.WebDriver.ChromeDriver" Version="2.46.0" />
  </ItemGroup>
</Project>

API.csproj:

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

  <ItemGroup>
    <ProjectReference Include="..\Scraping\Scraping.csproj" />
  </ItemGroup>

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <LangVersion>7.2</LangVersion>
  </PropertyGroup>

</Project>

The trick is adding <PublishChromeDriver>true</PublishChromeDriver> to the transitive project to make it publish the chromedriver when running dotnet publish API.csproj The ChromeDriver package has custom build targets in the NuGet package so it is custom.

You can now use

new ChromeDriver(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));

and dotnet run API.csproj

Please correct me if I'm wrong. You have some kind of Class Library that has reference to Selenium and you would like to use ChromeDriver.exe but you are getting an error that it cannot be found under the following location. This is fairly simple. Currently you are referencing Class Library lets say Foo to API. Your Assembly Location will point to API bin location, whereas chromedriver.exe is located under Class library bin. If this is the case the only thing you would have to do is copy following chromedriver.exe to final bin directory which is API.

Add following Post Build Event to your API project to copy chromedriver:

  <Target Name="PostBuild" AfterTargets="PostBuildEvent">
    <Exec Command="copy $(SolutionDir)\ClassLibrary\bin\Debug\netstandard2.0\chromedriver.exe $(TargetDir)" />
  </Target>

This will copy your chromedriver.exe to API bin. Later while initializing ChromeDriver use:

        var options = new ChromeOptions();
        var service = ChromeDriverService.CreateDefaultService(AppDomain.CurrentDomain.BaseDirectory);

        WebDriver = new ChromeDriver(service, options);

While AppDomain.CurrentDomain.BaseDirectory will point to your API bin directory.