【F＃抽象类】抽象类是那些不提供类成员的完整实现的类。它可能包含非抽象方法。继承抽象类的类必须提供抽象类的所有抽象方法的实现。抽象类用于实现抽象。
句法：
// Abstract class syntax.
[<
AbstractClass>
]
type [ accessibility-modifier ] abstract-class-name =
[ inherit base-class-or-interface-name ]
[ abstract-member-declarations-and-member-definitions ]// Abstract member syntax.
abstract member member-name : type-signatureF＃抽象类示例
[<
AbstractClass>
]
type AbstractClass() =
class
abstract member ShowClassName : unit ->
unit
endtype DerivedClass()=
class
inherit AbstractClass()
override this.ShowClassName() = printf "This is derived class."
endlet a = new DerivedClass()
a.ShowClassName()输出：
This is derived class.
