1.
|
What is C#?
|
§ C# (pronounced "C sharp") is a
simple, modern, object-oriented, and type-safe programming language.
§ It will immediately be familiar to C and C++
programmers.
§ C# combines the high productivity of Rapid
Application Development (RAD) languages.
|
2.
|
What are the types
of comment in C#?
|
There are 3 types of comments in C#.
§ Single line (//)
§ Multi (/* */)
§ Page/XML Comments (///).
|
3.
|
What are the
namespaces used in C#.NET?
|
Namespace is a logical grouping of class.
§ using System;
§ using System.Collections.Generic;
§ using System.Windows.Forms;
|
4.
|
What are the
characteristics of C#?
|
There are several characteristics of C# are :
§ Simple
§ Type safe
§ Flexible
§ Object oriented
§ Compatible
§ Consistent
§ Interoperable
§ Modern
|
5.
|
What are the
different categories of inheritance?
|
Inheritance in Object Oriented Programming is
of four types:
§ Single inheritance : Contains one base class and one derived
class.
§ Hierarchical inheritance : Contains one base class and multiple derived
classes of the same base class.
§ Multilevel inheritance : Contains a class derived from a derived
class.
§ Multiple inheritance : Contains several base classes and a derived
class.
|
|
6.
|
What are the basic
concepts of object oriented programming?
|
It is necessary to understand some of the
concepts used extensively in object oriented programming.These include
§ Objects
§ Classes
§ Data abstraction and encapsulation
§ Inheritance
§ Polymorphism
§ Dynamic Binding
§ Message passing.
|
7.
|
Can you inherit
multiple interfaces?
|
Yes. Multiple
interfaces may be inherited in C#.
|
8.
|
What is inheritance?
|
Inheritance is
deriving the new class from the already existing one.
|
9.
|
Define scope?
|
Scope refers to the
region of code in which a variable may be accessed.
|
10.
|
What is the
difference between public, static and void?
|
§ public :The keyword public is an access modifier that tells the C#
compiler that the Main method is accessible by anyone.
§ static :The keyword static declares that the Main method is a global one
and can be called without creating an instance of the class. The compiler
stores the address of the method as the entry point and uses this information
to begin execution before any objects are created.
§ void : The keyword void is a type modifier that
states that the Main method does not return any value.
|
|
11.
|
What are the
modifiers in C#?
|
§ Abstract
§ Sealed
§ Virtual
§ Const
§ Event
§ Extern
§ Override
§ Readonly
§ Static
§ New
|
12.
|
What are the types
of access modifiers in C#?
|
Access modifiers in C# are :
§ public
§ protect
§ private
§ internal
§ internal protect
|
13.
|
What is boxing and
unboxing?
|
Implicit conversion of
value type to reference type of a variable is known as BOXING, for example
integer to object type conversion.
Conversion of reference type variable back to value type is called as UnBoxing. |
14.
|
What is object?
|
An object is an
instance of a class. An object is created by using operator new. A class that
creates an object in memory will contain the information about the values and
behaviours (or methods) of that specific object.
|
15.
|
Where are the types
of arrays in C#?
|
§ Single-Dimensional
§ Multidimensional
§ Jagged arrays.
|
|
16.
|
What is the
difference between Object and Instance?
|
An instance of a
user-defined type is called an object. We can instantiate many objects from
one class.
An object is an instance of a class. |
17.
|
Define destructors?
|
A destructor is called
for a class object when that object passes out of scope or is explicitly
deleted.A destructors as the name implies is used to destroy the objects that
have been created by a constructors.Like a constructor , the destructor is a
member function whose name is the same as the class name but is precided by a
tilde.
|
18.
|
What is the use of
enumerated data type?
|
An enumerated data
type is another user defined type which provides a way for attaching names to
numbers thereby increasing comprehensibility of the code. The enum keyword
automatically enumerates a list of words by assigning them values 0,1,2, and
so on.
|
19.
|
Define Constructors?
|
A constructor is a
member function with the same name as its class. The constructor is invoked
whenever an object of its associated class is created.It is called
constructor because it constructs the values of data members of the class.
|
20.
|
What is
encapsulation?
|
The wrapping up of
data and functions into a single unit (called class) is known as
encapsulation. Encapsulation containing and hiding information about an
object, such as internal data structures and code.
|
|
21.
|
Does c# support
multiple inheritance?
|
No,its impossible
which accepts multi level inheritance.
|
22.
|
What is ENUM?
|
Enum are used to
define constants.
|
23.
|
What is a data set?
|
A DataSet is an in
memory representation of data loaded from any data source.
|
24.
|
What is the
difference between private and public keyword?
|
§ Private : The private keyword is the default access
level and most restrictive among all other access levels. It gives least
permission to a type or type member. A private member is accessible only
within the body of the class in which it is declared.
§ Public : The public keyword is most liberal among all
access levels, with no restrictions to access what so ever. A public member
is accessible not only from within, but also from outside, and gives free
access to any member declared within the body or outside the body.
|
25.
|
Define polymorphism?
|
Polymorphism means one
name, multiple forms. It allows us to have more than one function with the
same name in a program.It allows us to have overloading of operators so that
an operation can exhibit different behaviours in different instances.
|
|
26.
|
What is Jagged
Arrays?
|
§ A jagged array is an array whose elements are
arrays.
§ The elements of a jagged array can be of
different dimensions and sizes.
§ A jagged array is sometimes called an array–of–arrays.
|
27.
|
what is an abstract
base class?
|
An abstract class is a
class that is designed to be specifically used as a base class. An abstract
class contains at least one pure virtual function.
|
28.
|
How is method
overriding different from method overloading?
|
When overriding a
method, you change the behavior of the method for the derived class.
Overloading a method simply involves having another method with the same name
within the class.
|
29.
|
What is the
difference between ref & out parameters?
|
An argument passed to
a ref parameter must first be initialized. Compare this to an out parameter,
whose argument does not have to be explicitly initialized before being passed
to an out parameter.
|
30.
|
What is the use of
using statement in C#?
|
The using statement is
used to obtain a resource, execute a statement, and then dispose of that
resource.
|
|
31.
|
What is
serialization?
|
Serialization is the
process of converting an object into a stream of bytes.
De-serialization is the opposite process of creating an object from a stream of bytes. Serialization / De-serialization is mostly used to transport objects. |
32.
|
What are the
difference between Structure and Class?
|
§ Structures are value type and Classes are
reference type
§ Structures can not have contractors or
destructors.
§ Classes can have both contractors and
destructors.
§ Structures do not support Inheritance, while
Classes support Inheritance.
|
33.
|
What is difference
between Class And Interface?
|
Class : is logical representation of object. It is
collection of data and related sub procedures with defination.
Interface : is also a class containg methods which is not having any definations.Class does not support multiple inheritance. But interface can support. |
34.
|
What is Delegates?
|
Delegates are a
type-safe, object-oriented implementation of function pointers and are used
in many situations where a component needs to call back to the component that
is using it.
|
35.
|
What is
Authentication and Authorization?
|
Authentication is the process of identifying users.
Authentication is identifying/validating the user against the credentials
(username and password).
Authorization performs after authentication. Authorization is the process of granting access to those users based on identity. Authorization allowing access of specific resource to user. |
|
36.
|
What is a base
class?
|
A class declaration
may specify a base class by following the class name with a colon and the
name of the base class. omitting a base class specification is the same as
deriving from type object.
|
37.
|
Can “this” be used
within a static method?
|
No ‘This’ cannot be
used in a static method. As only static variables/methods can be used in a
static method.
|
38.
|
What is difference
between constants, readonly and, static ?
|
§ Constants: The value can’t be changed.
§ Read-only: The value will be initialized only
once from the constructor of the class.
§ Static: Value can be initialized once.
|
39.
|
What are the
different types of statements supported in C#?
|
C# supports several different kinds of
statements are
§ Block statements
§ Declaration statements
§ Expression statements
§ Selection statements
§ Iteration statements
§ Jump statements
§ Try catch statements
§ Checked and unchecked
§ Lock statement
|
40.
|
What is an interface
class?
|
It is an abstract
class with public abstract methods all of which must be implemented in the
inherited classes.
|
|
41.
|
what are value types
and reference types?
|
Value types are stored
in the Stack.
Examples : bool, byte, chat, decimal, double, enum , float, int, long, sbyte, short, strut, uint, ulong, ushort. Reference types are stored in the Heap. Examples : class, delegate, interface, object, string. |
42.
|
What is the
difference between string keyword and System.String class?
|
String keyword is an
alias for Syste.String class. Therefore, System.String and string keyword are
the same, and you can use whichever naming convention you prefer. The String
class provides many methods for safely creating, manipulating, and comparing
strings.
|
43.
|
What are the two
data types available in C#?
|
§ Value type
§ Reference type
|
44.
|
What are the
different types of Caching?
|
There are three types of Caching :
§ Output Caching: stores the responses from an
asp.net page.
§ Fragment Caching: Only caches/stores the
portion of page (User Control)
§ Data Caching: is Programmatic way to Cache
objects for performance.
|
45.
|
What is the
difference between Custom Control and User Control?
|
Custom Controls are compiled code (Dlls), easier to use,
difficult to create, and can be placed in toolbox. Drag and Drop controls.
Attributes can be set visually at design time. Can be used by Multiple
Applications (If Shared Dlls), Even if Private can copy to bin directory of
web application add reference and use. Normally designed to provide common
functionality independent of consuming Application.
User Controls are similar to those of ASP include files, easy to create, can not be placed in the toolbox and dragged - dropped from it. A User Control is shared among the single application files. |
|
46.
|
What is methods?
|
A method is a member
that implements a computation or action that can be performed by an object or
class. Static methods are accessed through the class. Instance methods are
accessed through instances of the class.
|
47.
|
What is fields?
|
A field is a variable
that is associated with a class or with an instance of a class.
|
48.
|
What is events?
|
An event is a member
that enables a class or object to provide notifications. An event is declared
like a field except that the declaration includes an event keyword and the
type must be a delegate type.
|
49.
|
What is literals and
their types?
|
Literals are value constants assigned to
variables in a program. C# supports several types of literals are
§ Integer literals
§ Real literals
§ Boolean literals
§ Single character literals
§ String literals
§ Backslash character literals
|
50.
|
What is the
difference between value type and reference type?
|
§ Value types are stored on the stack and when a
value of a variable is assigned to another variable.
§ Reference types are stored on the heap, and
when an assignment between two reference variables occurs.
|
|
51.
|
What are the
features of c#?
|
§ C# is a simple and powerful programming
language for writing enterprise edition applications.
§ This is a hybrid of C++ and VB. It retains
many C++ features in the area statements,expressions, and operators and
incorporated the productivity of VB.
§ C# helps the developers to easily build the
web services that can be used across the Internet through any language, on
any platform.
§ C# helps the developers accomplishing with
fewer lines of code that will lead to the fewer errors in the code.
§ C# introduces the considerable improvement and
innovations in areas such as type safety,versioning. events and garbage
collections.
|
52.
|
What are the types
of errors?
|
§ Syntax error
§ Logic error
§ Runtime error
|
53.
|
What is the
difference between break and continue statement?
|
The break statement is used to terminate the current enclosing
loop or conditional statements in which it appears. We have already used the
break statement to come out of switch statements.
The continue statement is used to alter the sequence of execution. Instead of coming out of the loop like the break statement did, the continue statement stops the current iteration and simply returns control back to the top of the loop. |
54.
|
Define namespace?
|
The namespace are
known as containers which will be used to organize the hierarchical set of
.Net classes.
|
55.
|
What is a code
group?
|
A code group is a set
of assemblies that share a security context.
|
|
56.
|
What are sealed
classes in C#?
|
The sealed modifier is
used to prevent derivation from a class. A compile-time error occurs if a
sealed class is specified as the base class of another class.
|
57.
|
What is the
difference between static and instance methods?
|
A method declared with
a static modifier is a static method. A static method does not operate on a
specific instance and can only access static members.
A method declared without a static modifier is an instance method. An instance method operates on a specific instance and can access both static and instance members. The instance on which an instance method was invoked can be explicitly accessed as this. It is an error to refer to this in a static method. |
58.
|
What are the
different types of variables in C#?
|
Different types of variables used in C# are :
§ static variables
§ instance variable
§ value parameters
§ reference parameters
§ array elements
§ output parameters
§ local variables
|
59.
|
What is meant by
method overloading?
|
Method overloading
permits multiple methods in the same class to have the same name as long as
they have unique signatures. When compiling an invocation of an overloaded
method, the compiler uses overload resolution to determine the specific
method to invoke
|
60.
|
What is parameters?
|
Parameters are used to
pass values or variable references to methods. The parameters of a method get
their actual values from the arguments that are specified when the method is
invoked. There are four kinds of parameters: value parameters, reference parameters,
output parameters, and parameter arrays.
|
|
61.
|
Is C# is object
oriented?
|
YEs, C# is an OO
langauge in the tradition of Java and C++.
|
62.
|
What is the
difference between Array and Arraylist?
|
An array is a
collection of the same type. The size of the array is fixed in its
declaration. A linked list is similar to an array but it doesn’t have a
limited size.
|
63.
|
What are the special
operators in C#?
|
C# supports the following special operators.
§ is (relational operator)
§ as (relational operator)
§ typeof (type operator)
§ sizeof (size operator)
§ new (object creator)
§ .dot (member access operator)
§ checked (overflow checking)
§ unchecked (prevention of overflow checking)
|
64.
|
What is meant by
operators in c#?
|
An operator is a
member that defines the meaning of applying a particular expression operator
to instances of a class. Three kinds of operators can be defined: unary
operators, binary operators, and conversion operators. All operators must be
declared as public and static.
|
65.
|
What is a
parameterized type?
|
A parameterized type
is a type that is parameterized over another value or type.
|
|
66.
|
What are the
features of abstract class?
|
§ An abstract class cannot be instantiated, and
it is an error to use the new operator on an abstract class.
§ An abstract class is permitted (but not
required) to contain abstract methods and accessors.
§ An abstract class cannot be scaled.
|
67.
|
What is the use of
abstract keyword?
|
The modifier abstract is a keyword used with a class, to indicate
that this class cannot itself have direct instances or objects, and it is
intended to be only a 'base' class to other classes.
|
68.
|
What is the use of
goto statement?
|
The goto statement is
also included in the C# language. This goto can be used to jump from inside a
loop to outside. But jumping from outside to inside a loop is not allowed.
|
69.
|
What is the
difference between console and window application?
|
§ A console application, which is designed to
run at the command line with no user interface.
§ A Windows application, which is designed to
run on a user’s desktop and has a user interface.
|
70.
|
What is the use of
return statement?
|
The return statement is associated with
procedures (methods or functions). On executing the return statement, the
system passes the control from the called procedure to the calling procedure.
This return statement is used for two purposes :
§ to return immediately to the caller of the
currently executed code
§ to return some value to the caller of the
currently executed code.
|
|
71.
|
What is the
difference between Array and LinkedList?
|
Array is a simple
sequence of numbers which are not concerned about each others positions. they
are independent of each others positions. adding,removing or modifying any
array element is very easy. Compared to arrays ,linked list is a comlicated
sequence of numbers.
|
72.
|
Does C# have a
throws clause?
|
No, unlike Java, C#
does not require the developer to specify the exceptions that a method can
throw.
|
73.
|
Does C# support a
variable number of arguments?
|
Yes, uisng the params
keyword. The arguments are specified as a list of arguments of a specific
type.
|
74.
|
Can you override
private virtual methods?
|
No, private methods
are not accessible outside the class.
|
75.
|
What is a multi cast
delegates?
|
Each delegate object
holds reference to a single method. However, it is possible for a delegate
object to hold references of and invoke multiple methods. Such delegate
objects are called multicast delegates or combinable delegates.
|
|
76.
|
Which is an
exclusive feature of C#?
|
Xml documentation.
|
77.
|
Is using of
exceptions in C# recommended?
|
Yes, exceptions are
the recommended error handling mechanism in .NET Framework.
|
78.
|
What does a break
statement do in switch statements?
|
§ The break statement terminates the loop in
which it exists. It also changes the flow of the execution of a program.
§ In switch statements, the break statement is
used at the end of a case statement. The break statement is mandatory in C#
and it avoids the fall through of one case statement to another.
|
79.
|
Is C# object
oriented?
|
Yes, C# is an OO
language in the tradition of java and C++.
|
80.
|
What is smart
navigation?
|
The cursor position is
maintained when the page gets refreshed due to the server side validation and
the page gets refreshed.
|
|
81.
|
What is the
difference between CONST and READONLY?
|
Both are meant for
constant values. A const field can only be initialized at the declaration of
the field. A readonly field can be initialized either at the declaration or.
|
82.
|
Does C# have a
throws clause?
|
No, unlike Java, C#
does not require (or even allow) the developer to specify the exceptions that
a method can throw.
|
83.
|
What are the
different ways a method can be overloaded?
|
Different parameter
data types, different number of parameters, different order of parameters.
|
84.
|
Do events have
return type?
|
No, events do not have
return type.
|
85.
|
What is event?
|
§ An event is an action performed based on
another method of the program.
§ An event is a delegate type dass member that
is used by an object or a class to provide a notification to other objects
that an event has occurred.
§ An event can be declared with the help of the
event keyword.
|
|
86.
|
What is an
identifier?
|
Identifiers are
nothing but names given to various entities uniquely identified in a program.
|
87.
|
What are the
different types of literals in C#?
|
§ Boolean literals : True and False are literals
of the Boolean type that map to the true and false state, respectively.
§ Integer literals : Used to write values of
types Int, ulnt, long, and ulong.
§ Real literals : Used to write values of types
float, double, and dedmal.
§ Character literals : Represents a single
character and usually consists of a character in quotes, such as 'a'.
§ String literals : C# supports two types of
string literals, regular string literal and verbatim string literals. A
regular string literal consists of zero or more characters enclosed in double
quotes, such as "116110". A verbatim string literal consists of an
@ character followed by a double–quote character, such as ©"hello".
§ The Null literal : Represents the null–type.
|
88.
|
What is meant by
data encapsulation?
|
Data encapsulation,
also referred to as data hiding, is the mechanism whereby the implementation
details of a class are kept hidden from the user. The user can only perform a
restricted set of operations on the hidden members of the class by executing
special functions called methods.
|
89.
|
Can you override
private virtual methods?
|
No. Private methods
are not accessible outside the class.
|
90.
|
What is the main
difference between a subprocedure and a function?
|
Subprocedures do not
return a value, while functions do.
|
|
91.
|
How does C# differ
from C++?
|
§ C# does not support #include statement. It
uses only using statement.
§ In C# , class definition does not use a
semicolon at the end.
§ C# does not support multiple code inheritance.
§ Casting in C# is much safer than in c++.
§ In C# switch can also be used on string
values.
§ Command line parameters array behave
differently in C# as compared to C++.
|
92.
|
What is nested
class?
|
§ A Nested classes are classes within classes.
§ A nested class is any class whose declaration
occurs within the body of another class or interface.
|
93.
|
Can you have
parameters for static constructors?
|
No, static
constructors cannot have parameters.
|
94.
|
Is String is Value
Type or Reference Type in C#?
|
String is an
object(Reference Type).
|
95.
|
Does C# provide copy
constructor?
|
No, C# does not
provide copy constructor.
|
|
96.
|
Can a class or a
struct have multiple constructors?
|
Yes, a class or a
struct can have multiple constructors. Constructors in C# can be overloaded.
|
97.
|
Can you create an
instance of an interface?
|
No, you cannot create
an instance of an interface.
|
98.
|
Can an Interface
contain fields?
|
No, an Interface
cannot contain fields.
|
99.
|
Can a class have
static constructor?
|
Yes, a class can have
static constructor. Static constructors are called automatically, immediately
before any static fields are accessed, and are generally used to initialize
static class members. It is called automatically before the first instance is
created or any static members are referenced. Static constructors are called
before instance constructors. An example is shown below.
|
100.
|
What is the main use
of delegates in C#?
|
Delegates are mainly
used to define call back methods.
|
|
101.
|
What is the
difference between Shadowing and Overriding?
|
§ Overriding redefines only the implementation
while shadowing redefines the whole element.
§ In overriding derived classes can refer the
parent class element by using "ME" keyword, but in shadowing you
can access it by "MYBASE".
|
102.
|
Can events have
access modifiers?
|
Yes, you can have
access modifiers in events. You can have events with the protected keyword,
which will be accessible only to inherited classes. You can have private
events only for objects in that class.
|
103.
|
Why is the virtual
keyword used in code?
|
The Virtual keyword is
used in code to define methods and the properties that can be overridden in
derived classes.
|
104.
|
What are
constructors and destructors?
|
§ Constructors and destructors are special
methods.
§ Constructors and destructors are special
methods of every class.
§ Each class has its own constructor and
destructor and are called automatically when the instance of a class is
created or destroyed.
§ The constructor initializes all class members
whenever you access the class and the destructor destroys them when the
objects are not required anymore.
|
105.
|
How can we suppress
a finalize method?
|
GC.SuppressFinalize()
|
|
106.
|
Does C# support a
variable number of arguments?
|
§ Yes, using the params keyword.
§ The arguments are specified as a list of
arguments of a specific type, e.g., int. For ultimate flexibility, the type
can be object.
§ The standard example of a method which uses
this approach is System.console.writeLine().
|
107.
|
Which method will
you call to start a thread?
|
Start
|
108.
|
What is Generic?
|
§ Generic help us to create flexible strong type
collection.
§ Generic basically seperate the logic from the
datatype in order maintain better reusability, better maintainability etc.
|
109.
|
What are the
different types of polymorphism?
|
There are two types of polymorphism. They are
§ Compile time Polymorphism
§ Run time Polymorphism
|
110.
|
What is the
difference between compile time polymorphism and run time polymorphism?
|
Compile time Polymorphism
§ Compile time Polymorphism also known as method
overloading.
§ Method overloading means having two or more
methods with the same name but with different signatures.
Run time Polymorphism
§ Run time Polymorphism also known as method
overriding.
§ Method overriding means having two or more
methods with the same name , same signature but with different
implementation.
|
|
111.
|
Which namespace
enables multithreaded programming in XML?
|
System.Threading
|
112.
|
Can we declare a
block as static in c#?
|
No, because c# doesnot
support static block, but it supports static method.
|
113.
|
Can we declare a
method as sealed?
|
In C# a method can't
be declared as sealed. However when we override a method in a derived class,
we can declare the overridden method as sealed. By declaring it as sealed, we
can avoid further overriding of this method.
|
114.
|
What Command is used
to implement properties in C#?
|
get & set access
modifiers are used to implement properties in c#.
|
115.
|
What is static
member?
|
The member defined as
static which can be invoked directly from the class level, rather than from
its instance.
|
|
116.
|
What is the syntax
to inherit from a class in C#?
|
§ When a class is derived from another class,
then the members of the base class become the members of the derived class.
§ The access modifier used while accessing
members of the base class specifies the access status of the base class
members inside the derived class.
§ The syntax to inherit a class from another
class In C# is as follows :
class MyNewClass : MyBaseClass |
117.
|
What is a basic
difference between the while loop and do while loop in C#?
|
The while loop tests
its condition at the beginning, which means that the enclosed set of
statements run for zero or more number of times if the condition evaluates to
true. The do while loop iterates a set of statements at least once and then
checks the condition at the end.
|
118.
|
What is the main
difference between a subprocedure and a function?
|
Subprocedures do not
return a value, while functions do.
|
119.
|
What are sealed
classes in c#?
|
§ The sealed modifier is used to prevent
derivation from a class.
§ A compile time error occurs if a sealed class
is specified as the base class of another class.
|
120.
|
What is the
difference between class and an Interface?
|
§ Abstract classes can have implementations for
some of its members, but the interface can't have implementation for any of
its members.
§ Interfaces cannot have fields where as an
abstract class can have fields.
§ An interface can inherit from another
interface only and cannot inherit from an abstract class, where as an
abstract class can inherit from another abstract class or another interface.
§ A class can inherit from multiple interfaces
at the same time, where as a class cannot inherit from multiple classes at
the same time.
§ Abstract class members can have access
modifiers where as interface members cannot have access modifiers.
|
|
121.
|
What is the
difference between an abstract method & virtual method?
|
An Abstract method
does not provide an implementation and forces overriding to the deriving
class (unless the deriving class also an abstract class), where as the
virtual method has an implementation and leaves an option to override it in
the deriving class. Thus Virtual method has an implementation & provides
the derived class with the option of overriding it. Abstract method does not
provide an implementation & forces the derived class to override the
method.
|
122.
|
What is Static
Method?
|
It is possible to
declare a method as Static provided that they don't attempt to access any
instance data or other instance methods.
|
123.
|
What is a New
modifier?
|
The new modifier hides
a member of the base class. C# supports only hide by signature.
|
124.
|
What are the
advantages of get and set properties in C#?
|
§ The get property accessor is used to return
the property value.
§ The set property accessor is used to assign a
new value.
|
125.
|
What are the
difference between const and readonly?
|
§ A const can not be static, while readonly can
be static.
§ A const need to be declared and initialized at
declaration only, while a readonly can be initialized at declaration or by
the code in the constructor.
§ A const's value is evaluated at design time,
while a readonly's value is evaluated at runtime.
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