在.NET Core中替换AppDomain.GetLoadedAssemblies（）？

Question

I'm trying to write some logic to mirror some existing logic in an original .NET application. In my OnModelCreating() method I want to load all current types in loaded assemblies to find the ones that need to be registered for entity type configuration in the model.

This was done in .NET with AppDomain.CurrentDomain.GetAssemblies().Select(a => a.GetTypes()) , however AppDomain no longer exists in .NET Core.

Is there a new way to do this?

I have seen some examples online of using DependencyContext.Default.RuntimeLibraries however DependencyContext.Default does not seem to exist anymore either.

Edit:

I have found now that adding Microsoft.Extensions.DependencyModel to a .netcoreapp1.1 project works. However I am actually writing a solution with multiple projects and I somehow need do this type loading in my .netstandard1.4 project where my DbContext implementation and entity type configuration is

Answer 1

What you are looking for is broadly explained here . The author recommends creating a polyfill.

I am going to copy and paste in case the page goes missing.

public class AppDomain
{
    public static AppDomain CurrentDomain { get; private set; }

    static AppDomain()
    {
        CurrentDomain = new AppDomain();
    }

    public Assembly[] GetAssemblies()
    {
        var assemblies = new List<Assembly>();
        var dependencies = DependencyContext.Default.RuntimeLibraries;
        foreach (var library in dependencies)
        {
            if (IsCandidateCompilationLibrary(library))
            {
                var assembly = Assembly.Load(new AssemblyName(library.Name));
                assemblies.Add(assembly);
            }
        }
        return assemblies.ToArray();
    }

    private static bool IsCandidateCompilationLibrary(RuntimeLibrary compilationLibrary)
    {
        return compilationLibrary.Name == ("Specify")
            || compilationLibrary.Dependencies.Any(d => d.Name.StartsWith("Specify"));
    }
}

Answer 2

Fixed this by upgrading my .netstandard projects from 1.4 to 1.6 . The package Microsoft.Extensions.DependencyModel 1.1.2 now works.

Edit:

Using .netstandard2.0 removes the need for an AppDomain polyfill class since it contains many more .NET APIs including System.AppDomain