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New Message on cochindotnet
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From: VishalRJoshi
Message 1 in Discussion
Interface vs. Abstract classes
Abstract class needs to have at least one "pure virtual method" *
In case of Interface all the methods should be "pure virtual"
An Abstract class can have all methods as "pure virtual" and still it will
not allow multiple inheritance... With Interface multiple inheritance is
possible in .Net...
Various access modifiers such as abstract, protected, internal, public,
virtual, overrides etc are not useful in case of Interface but they are in
case of Abstract classes
Class implementing Interface has to implement all the methods of the
Interface, this is not required in case of Abstract classes
As Interface cannot be instantiated, they do not have constructors and
destructors like the way Abstract classes can...
Interface cannot contain a static method whereas an Abstract class can
have...
There are few more points which I can recollect but I think that this is
enough for a tip... If anyone needs more info do write back to me... :-)
* pure virtual method is a method which has just definition but not
implementation...
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An addition to yesterday's tip... We cannot access static member of a class
using object of a class in C#, though this is possible in VB.Net... Thanks
to Jacob Cynamon, MS & Kathleen Dollard, MVP for quickly reminding the
same... Thanks all for sending a wonderful queries & feedbacks and making
my evenings more useful...
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PS: Many of us work on weekends, I don't think (current thought!!) that its
a good practice doing that, at least if you are being gauged on the basis of
your willingness to work on weekends then its surely very bad... I am trying
to start a movement to abolish this social evil of working on weekends, so
no tips on weekends...:-)
BONUS TIP: Spend time with your family this weekend... :-)
Vishal Joshi
Microsoft MVP .Net
If You Think YOU CAN... You Can...
http://VishalJoshi.Blogspot.com
http://www.microsoft.com/india/mvp/indiamvp.aspx
http://groups.msn.com/ChennaiNetUserGroup
http://groups.msn.com/CNUG
http://groups.msn.com/NetBloomingtonUserGroup
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