Thumb Rules:
1) You can never create an object of an abstract class
2) You can never call a method of an abstract class

On Mon, Jun 14, 2010 at 6:05 PM, Akter Suriya <[email protected]> wrote:

> Yes Raghupathi,
>
> That you can check when you have computer in hand. What if this question is
> asked in interview (without machine)?
> Thanks,
>
> Suriya
>
>
> On Mon, Jun 14, 2010 at 5:51 PM, Raghupathi Kamuni 
> <[email protected]>wrote:
>
>> *If keyword is abstract, it would never compile.*
>> Error message will be "Cannot call an abstract base member: 'A.method1()'"
>>
>> *Code for Abstract method*
>> =====================
>> using System;
>> abstract class A
>> {
>>      public abstract void method1();
>> }
>> class B:A
>> {
>>  public override void method1()
>>  {
>>       base.method1();
>>      Console.WriteLine("B-->method1");
>>  }
>> }
>>
>> class MainClass
>> {
>>   public static void Main()
>>   {
>>  B b = new B();
>>  b.method1();
>>   }
>> }
>>
>>
>> *Code for Virtual method*
>> ===================
>> using System;
>> class A
>> {
>>      public virtual void method1(){}
>> }
>> class B:A
>> {
>>  public override void method1()
>>  {
>>   base.method1();
>>   Console.WriteLine("B-->method1");
>>  }
>> }
>>
>> class MainClass
>> {
>>   public static void Main()
>>   {
>>  B b = new B();
>>  b.method1();
>>   }
>> }
>>
>>
>>
>> On Mon, Jun 14, 2010 at 10:22 AM, Akter Suriya <[email protected]>wrote:
>>
>>> One of my friend asked me this question.
>>>
>>> class A
>>> {
>>> XXX method1()
>>> ......
>>> }
>>>
>>>
>>> class B : A
>>> {
>>> override method1 ()
>>> {
>>> base.method1();
>>> }
>>> }
>>>
>>> He says, how can we identify, XXX (written in front of method1 in class
>>> A) is virtual or abstract.
>>> Can anybody help me. Thanks.
>>>
>>> --
>>> Suriya
>>>
>>>
>>
>
>
> --
>
>

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