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Default Access Specifer
What is default access specifer of a class in C#? Is it internal or private?class foo{ int Var; }In the above code snippet. What is the default access specifier for the variable Var.
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phanish- Member Since Jul-2010 | Jul 16th, 2010
Default Access Specifier of a class is Internal and Default Access Specifier of Member Variable is Private
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Authentication Levels
How we can set Different levels of Authentication in .Net?What are the difference between Windows Authenticatin, Passport Authentication and Form Authentication?
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aanand_agrawal- Member Since Apr-2009 | Apr 30th, 2009
Windows authentication enables you to identify users without creating a custom page. Credentials are stored in the Web server’s local user database or an Active Directory domain. Once identified, you can use the user’s credentials to gain access to resources that are protected by Windows authorization.
Forms authentication enables you to identify users with a custom database, such as an ASP.NET membership database. Alternatively, you can implement your own custom database. Once authenticated, you can reference the roles the user is in to restrict access to portions of your Web site.
Passport authentication relies on a centralized service provided by Microsoft. Passport authentication identifies a user with using his or her e-mail address and a password, and a single Passport account can be used with many different Web sites. Passport authentication is primarily used for public Web sites with thousands of users.
Anonymous authentication does not require the user to provide credentials.Nirmal09
- Jan 13th, 2011
Windows Authentication Windows Authentication is the default authentication mechanism for ASP.NET applications. Windows Authentication is implemented in ASP.NET using the Windows authentication&n...
md.shahidkamal
- Oct 6th, 2010
Windows: User is authenticated by the windows server.Form: User is authenticated from the Customized Authentication technique ?...
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Virtual function in c#
explain virtual function in c# with an example
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bb.geetha- Member Since May-2008 | Jun 6th, 2008
Virtual functions implement the concept of polymorphism are the same as in C#, except that you use the override keyword with the virtual function implementaion in the child class. The parent class uses the same virtual keyword. Every class that overrides the virtual method will use the override keyword.
class Shape
{
public virtual void Draw()
{
Console.WriteLine("Shape.Draw") ;
}
}
class Rectangle : Shape
{
public override void Draw()
{
Console.WriteLine("Rectangle.Draw");
}
}
Elansan
- Mar 4th, 2010
It has override keyword in the child class and the base class containing the virutual keyword.
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What are public, private and static constructors and differences between them?
Obiageligeorge
- Aug 23rd, 2011
A public constructor is accessible anywhere in the application
A private constructor is restricted to the class within the application
Static constructor give access to the data without necessarily creating an object classmd.shahidkamal
- Aug 22nd, 2011
Constructor are used for creating an object and returning a reference of the object. so whenever we write class1 obj=new class1(); Public Constructor The new Class1() is actually calling a public ze...
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Is it possible to have different access modifiers on the get/set methods of a property? Justify
S Manasa
- Jul 8th, 2019
Generally, the access modifier of the property is considered as the access modifier of both the accessors if no access modifier is specified for the accessors. Only one of the accessor can be specifi...
LordAlex
- Nov 3rd, 2011
The accessor modifier must declare an accessibility that is more restrictive than the declared accessibility of the property itself.
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What is the difference between const and static read-only?
The difference is that static read-only can be modified by the containing class, but const can never be modified and must be initialized to a compile time constant. To expand on the static read-only case a bit, the containing class can only modify it:-- in the variable declaration (through a variable initializer).-- in the static constructor (instance constructors if it's not static).
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Answered by: Eddie Quiroz
- Sep 3rd, 2005
A const must be initialized at the time of its creation. A readonly field can be assigned to once in the class constructor allowing you to pass in the value at run-time. Declaring fields as const protects both you and other programmers from accidentally changing the value of the field. Also note that with const fields, the compiler performs some optimization by not declaring any stack space for the field. The readonly keyword is similar to const, with two exceptions. First, the storage of a readonly field is the same as a regular read-write field, and thus there is no performance benefit. Secondly, readonly fields can be initialized in the constructor of the containing class.
md.shahidkamal
- Aug 16th, 2010
The Constant Fields are those which cannot be changed in runtime. Its value has to be assigned at declaration time. const string strMyString="Constant Data" ; //This is valid.Once declared now the val...
chandra_123
- Apr 7th, 2009
As static read-only variables must be initialized in the static constructor (static constructor cannot have parameters and it cannot be called manually), it is efficient to used const variables over static read-only variables if you know the values at creation of these variables.
