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How to declare an abstract property?

Posted on 2007-03-22
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Last Modified: 2010-05-18
How to declare an abstract property?
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Question by:chuang4630
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A property inside a class can be declared as abstract by using the keyword abstract. Remember that an abstract property in a class carries no code at all. The get/set accessors are simply represented with a semicolon. In the derived class we must implement both set and get assessors.  

If the abstract class contains only set accessor, we can implement only set in the derived class.  

The following program shows an abstract property in action.  (X)


abstract class Abstract
{
public abstract int X
{
get;
set;
}
}
class Concrete : Abstract
{
public override int X
{
get
{
Console.Write(" GET");
return 10;
}
set
{
Console.Write(" SET");
}
}
}
class MyClient
{
public static void Main()
{
Concrete c1 = new Concrete();
c1.X = 10;
Console.WriteLine(c1.X);//Displays 'SET GET 10'
}
}

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