獲取基類型的所有最後的後代？

Question

這個問題的How to find types that are direct descendants of a base class?

相反如果是這樣的繼承層次我有，

class Base 
{ 

} 



class Derived1 : Base 
{ 

} 

class Derived1A : Derived1 
{ 

} 

class Derived1B : Derived1 
{ 

} 



class Derived2 : Base 
{ 

} 

我需要一個機制來找到特定組件的所有子類型Base類，它們在該繼承樹的結尾。換句話說，

SubTypesOf(typeof(Base)) 

應該給我

-> { Derived1A, Derived1B, Derived2 } 

Answer 1

這是我想出了。不知道一些更優雅/有效的解決方案存在..

public static IEnumerable<Type> GetLastDescendants(this Type t) 
{ 
    if (!t.IsClass) 
     throw new Exception(t + " is not a class"); 

    var subTypes = t.Assembly.GetTypes().Where(x => x.IsSubclassOf(t)).ToArray(); 
    return subTypes.Where(x => subTypes.All(y => y.BaseType != x)); 
} 

而且爲了完整起見，我將給出轉貼here

public static IEnumerable<Type> GetDirectDescendants(this Type t) 
{ 
    if (!t.IsClass) 
     throw new Exception(t + " is not a class"); 

    return t.Assembly.GetTypes().Where(x => x.BaseType == t); 
}