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Abstract virtual sealed 关键字的意义(2006-01-13 10:02:00)
摘要：摘抄http://yangbin990.cnblogs.com/archive/2005/09/13/236235.html的文章,初略讲解了一下C#中Abstract virtual sealed 关键字的意义,保存供学习参考:)
参考:Abstract and Sealed Classes and Class Members (C# Programming Guide).
public abstract class A
{
// Class members here.
}
abstract :必须被继承.
public abstract class A
{
public abstract void DoWork(int i);
}
abstract class 里也可包含abstract 方法, 但方法就没有{}, 因为abstract 方法不可以有内容. 继承abstract class 的class 内部必须定义那些abstract 方法, 给他真正的含义.
// compile with: /target:library
public class D
{
public virtual void DoWork(int i)
{
// Original implementation.
}
}
public abstract class E : D
{
public abstract override void DoWork(int i);
}
public class F : E
{
public override void DoWork(int i)
{
&n......