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New Message on BDOTNET
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From: Prasanna_kakanoor
Message 3 in Discussion
The sealed modifier is used to prevent derivation from a class. An error occurs if a
sealed class is specified as the base class of another class. A sealed class cannot
also be an abstract class.
The sealed modifier is primarily used to prevent unintended derivation, but it also
enables certain run-time optimizations. In particular, because a sealed class is known
to never have any derived classes, it is possible to transform virtual function member
invocations on sealed class instances into non-virtual invocations.
In C# structs are implicitly sealed; therefore, they cannot be inherited.
using System;
sealed class MyClass
{
public int x;
public int y;
}
class MainClass
{
public static void Main()
{
MyClass mC = new MyClass();
mC.x = 110;
mC.y = 150;
Console.WriteLine("x = {0}, y = {1}", mC.x, mC.y);
}
}
In the preceding example, if you attempt to inherit from the sealed class by using a
statement like this:
class MyDerivedC: MyClass {} // Error
You will get the error message:
'MyDerivedC' cannot inherit from sealed class 'MyBaseC'.
Regards,
Prasanna K L [MCAD(CM) | MCSD.NET(Early Achiever)] [MS Community Star]
|Sr. Software Engineer�|First American Interactive Division|Office:+91 80�5115 6050
Extn 4084 |Mobile:+91 98452 76356�|Fax:+91 80�841 1858 |[EMAIL PROTECTED] |
|Unit 1, Level 1, Explorer Building, International TechPark, Whitefield Road,
Bangalore-560066|India| Website: www.firstam.com |
-----Original Message-----
From: BDOTNET [mailto:[EMAIL PROTECTED]
Sent: Tuesday, December 16, 2003 10:05 AM
To: BDOTNET
Subject: Sealed Class
New Message on BDOTNET
Sealed Class
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Recommend
Message 1 in Discussion
From: Ambrose
Hi All,
* �What is a Sealed Class?
* �Difference between const and static readonly�(Readonly and Const)
* �When GC will be called in a Application How can we called programatically
* When the Destructor will be called?
Thanks
Anandraj.A.
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