Static Answer Guide
MOP Connection: Static Electricity: sublevels 8 and 9 Coulomb's Law can be states in equation form as kQ1 Q2 F = d2 This equation can be used as an algebraic recipe for solving computational problems or as a guide to thinking about how an alteration in the quantity of charge or the distance between charged. A is illegal because “default” is not a keyword. D is false because transient variables may never be static.
-->A static class is basically the same as a non-static class, but there is one difference: a static class cannot be instantiated. In other words, you cannot use the new operator to create a variable of the class type. Because there is no instance variable, you access the members of a static class by using the class name itself. For example, if you have a static class that is named UtilityClass that has a public static method named MethodA, you call the method as shown in the following example:
A static class can be used as a convenient container for sets of methods that just operate on input parameters and do not have to get or set any internal instance fields. For example, in the .NET Framework Class Library, the static System.Math class contains methods that perform mathematical operations, without any requirement to store or retrieve data that is unique to a particular instance of the Math class. That is, you apply the members of the class by specifying the class name and the method name, as shown in the following example.
As is the case with all class types, the type information for a static class is loaded by the .NET Framework common language runtime (CLR) when the program that references the class is loaded. The program cannot specify exactly when the class is loaded. However, it is guaranteed to be loaded and to have its fields initialized and its static constructor called before the class is referenced for the first time in your program. A static constructor is only called one time, and a static class remains in memory for the lifetime of the application domain in which your program resides.
Note
To create a non-static class that allows only one instance of itself to be created, see Implementing Singleton in C#.
The following list provides the main features of a static class:
Contains only static members.
Cannot be instantiated.
Is sealed.
Cannot contain Instance Constructors.
Creating a static class is therefore basically the same as creating a class that contains only static members and a private constructor. A private constructor prevents the class from being instantiated. The advantage of using a static class is that the compiler can check to make sure that no instance members are accidentally added. The compiler will guarantee that instances of this class cannot be created.
Static classes are sealed and therefore cannot be inherited. They cannot inherit from any class except Object. Static classes cannot contain an instance constructor; however, they can contain a static constructor. Non-static classes should also define a static constructor if the class contains static members that require non-trivial initialization. For more information, see Static Constructors.
Dil deewana dhoondta hai ek haseen ladki mp3 nedlasting. Dil Deewana Dhoondta Hai Ek Haseen Ladki. 320 kbps Mahanand Pramanik. Dil Diwana Dhoondta Hai Koi Ek Haseen Ladki Ek Rishtaa Bollywood Dj Songjbl Hindi Dj Remix Song. 320 kbps Dj chattu. Download Dildiwana Dhundta He Ek Ladki Nagpuri Mp3 Songs Video Music Download Music Dildiwana Dhundta He Ek Ladki Nagpuri Mp3 Songs, filetype:mp3 listen Dildiwana Dhundta He Ek Ladki Nagpuri Mp3 Songs Mp3. Dil Deewana Dhoondta Hai Ek Haseen Ladki Dj Remix By Gour Rock Edit By Mahato Vaiquot. 320 kbps Mahato Vai. Download Dil Deewana Dhundta Ha Ik Video Music Download Music Dil Deewana Dhundta Ha Ik, filetype:mp3 listen Dil Deewana Dhundta Ha Ik Mp3. Video Dil Deewana Dhundta Ha Ik Gratis Download Dil Deewana Dhundta Ha Ik Fast, Easy, Simple Download Dil Deewana Dhundta Ha Ik. Dil Diwana Dhoondta Hai Koi Ek Haseen Ladki Ek Rishtaa Bollywood Dj.
Example
Here is an example of a static class that contains two methods that convert temperature from Celsius to Fahrenheit and from Fahrenheit to Celsius:
Static Members
A non-static class can contain static methods, fields, properties, or events. The static member is callable on a class even when no instance of the class has been created. The static member is always accessed by the class name, not the instance name. Only one copy of a static member exists, regardless of how many instances of the class are created. Static methods and properties cannot access non-static fields and events in their containing type, and they cannot access an instance variable of any object unless it is explicitly passed in a method parameter.
It is more typical to declare a non-static class with some static members, than to declare an entire class as static. Two common uses of static fields are to keep a count of the number of objects that have been instantiated, or to store a value that must be shared among all instances.
Static methods can be overloaded but not overridden, because they belong to the class, and not to any instance of the class.
Although a field cannot be declared as static const, a const field is essentially static in its behavior. It belongs to the type, not to instances of the type. Therefore, const fields can be accessed by using the same ClassName.MemberName notation that is used for static fields. No object instance is required.
C# does not support static local variables (variables that are declared in method scope).
You declare static class members by using the static keyword before the return type of the member, as shown in the following example:
Static members are initialized before the static member is accessed for the first time and before the static constructor, if there is one, is called. To access a static class member, use the name of the class instead of a variable name to specify the location of the member, as shown in the following example:
If your class contains static fields, provide a static constructor that initializes them when the class is loaded.
A call to a static method generates a call instruction in Microsoft intermediate language (MSIL), whereas a call to an instance method generates a callvirt instruction, which also checks for a null object references. However, most of the time the performance difference between the two is not significant.
C# Language Specification
For more information, see Static classes and Static and instance members in the C# Language Specification. The language specification is the definitive source for C# syntax and usage.