[C#] 하나의 클래스의 모든 상속클래스 (자식클래스) 가져오기

  var listOfBs = (
                from domainAssembly in AppDomain.CurrentDomain.GetAssemblies()
                // alternative: from domainAssembly in domainAssembly.GetExportedTypes()
                from type in domainAssembly.GetTypes()
                where typeof(B).IsAssignableFrom(type)
                // alternative: && type != typeof(B)
                // alternative: && ! type.IsAbstract
                // alternative: where type.IsSubclassOf(typeof(B))
                select type).ToArray();

 

다른 버전

var listOfBs = AppDomain.CurrentDomain.GetAssemblies()
                // alternative: .GetExportedTypes()
                .SelectMany(domainAssembly => domainAssembly.GetTypes())
                .Where(type => typeof(B).IsAssignableFrom(type)
                // alternative: => type.IsSubclassOf(typeof(B))
                // alternative: && type != typeof(B)
                // alternative: && ! type.IsAbstract
                ).ToArray();

 

다른 버전

var result = System.Reflection.Assembly.GetExecutingAssembly()
    .GetTypes()
    .Where(t => t.BaseType != null && t.BaseType.IsGenericType && 
                t.BaseType.GetGenericTypeDefinition() == typeof(GenericClass<>));

 

인스턴스를 생성하는 버전

IEnumerable<AbstractDataExport> exporters = typeof(AbstractDataExport)
    .Assembly.GetTypes()
    .Where(t => t.IsSubclassOf(typeof(AbstractDataExport)) && !t.IsAbstract)
    .Select(t => (AbstractDataExport)Activator.CreateInstance(t));

 

리스트를 활용한 버전

public static class ReflectiveEnumerator
{
    static ReflectiveEnumerator() { }

    public static IEnumerable<T> GetEnumerableOfType<T>(params object[] constructorArgs) where T : class, IComparable<T>
    {
        List<T> objects = new List<T>();
        foreach (Type type in 
            Assembly.GetAssembly(typeof(T)).GetTypes()
            .Where(myType => myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(T))))
        {
            objects.Add((T)Activator.CreateInstance(type, constructorArgs));
        }
        objects.Sort();
        return objects;
    }
}

 

c# - Get all derived types of a type - Stack Overflow

c# - Get all inherited classes of an abstract class - Stack Overflow

c# - Find all derived types of generic class - Stack Overflow