AssemblyTypeScanner.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Dreamine.MVVM.Interfaces.DependencyInjection;
 
namespace Dreamine.MVVM.Core.AutoRegistration
{
    public sealed class AssemblyTypeScanner : IAssemblyTypeScanner
    {
        public IEnumerable<Assembly> GetCandidateAssemblies(Assembly rootAssembly)
        {
            if (rootAssembly is null)
            {
                throw new ArgumentNullException(nameof(rootAssembly));
            }
 
            return AppDomain.CurrentDomain
                .GetAssemblies()
                .Where(assembly => !assembly.IsDynamic && !string.IsNullOrWhiteSpace(assembly.FullName))
                .Prepend(rootAssembly)
                .Distinct();
        }

        public IEnumerable<Type> GetLoadableTypes(Assembly assembly)
        {
            if (assembly is null)
            {
                throw new ArgumentNullException(nameof(assembly));
            }
 
            try
            {
                return assembly.GetTypes();
            }
            catch (ReflectionTypeLoadException ex)
            {
                return ex.Types.Where(type => type is not null)!;
            }
        }
    }
}