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Abstract classes vs Concreate classes

 
Greenhorn
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Hi Friends,

Why do we need abstract class?
We can do every thing in concrete class.
Can anyone explain with example?

Thanks,
 
Ranch Hand
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I recommend you to read following articles. Although, they are taking about difference between Interface and Abstract class, still they have good inpust about why abstract classes are required.

Interfaces and Abstract Classes - the pillars of software design
Effective use of Interfaces and Abstract Classes
 
Bartender
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Not really an advanced question. Moving...
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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