May 13, 2021 vb.net
Modifiers are keywords
added by any programming element to emphasize how the programming element will be executed or accessed in the program
For example, access modifiers:
Public, Private, Protected, Friend, Protected Friend, etc.,
indicate the level of access for programming elements, such as variables, constants, enumerals, or classes.
The following table provides VB.Net list of the most modifiers:
| S.N | Modifier | Describe |
|---|---|---|
| 1 | Ansi | Specify that Visual Basic should group all strings to the National Standards Institute (ANSI) value, regardless of the name of the external procedure being declared. |
| 2 | Assembly | Specify that the properties at the beginning of the source file apply to the entire assembly. |
| 3 | Async | Indicates that the method or lambda expression it modified is asynchronous. S uch methods are called asynchronous methods. The caller of an asynchronous method can resume its work without waiting for the asynchronous method to complete. |
| 4 | Auto | During the call of an external procedure, chchetetmodifierpart in the hepter system provides character set information for grouping strings. I t also affects how Visual Basic searches for external procedure names in external files. The Auto modifier specifies that Visual Basic should group strings according to the .NET Framework rules. |
| 5 | Byref |
The specified argument is passed by reference, i.e. the called procedure can change the value of the variable below the argument in the calling code. I
t is used in the following contexts:
|
| 6 | BYVAL |
When you specify a pass parameter, the calling procedure or property cannot change the value of the variable below the argument in the calling code. I
t is used in the following contexts:
|
| 7 | Default | Identifys the property as the default property of its class, structure, or interface. |
| 8 | Friend |
Programming elements that specify one or more declarations can be accessed from the assembly that contains their claims, not just the components that declare them.
|
| 9 | In | It is used for common interfaces and agents. |
| 10 | Iterator | The specified function or Get accessor is an iterator. Aniterator performs a custom iteration of the collection. |
| 11 | Key | Key keywords enable you to specify behavior for properties of anonymous types. |
| 12 | Module | Specifies that the properties at the beginning of the source file apply to the current assembly module. It is different from the Module statement. |
| 13 | MustInherit | Specify that a class can only be used as a base class, and that you cannot create an object directly. |
| 14 | MustOverride | The specified property or procedure is not implemented in this class and must be overridten in the export class before it can be used. |
| 15 | Narrowing | Represents a conversion operator (CType) that converts a class or structure to a type that might not be able to hold some of the possible values of the original class or structure. |
| 16 | NotInheritable | The specified class cannot be used as a base class. |
| 17 | NotOverridable | Specifies that properties or procedures cannot be overriding in derived classes. |
| 18 | Optional | Specifies that procedure parameters can be omitted when a program is called. |
| 19 | Out | For generic type parameters, the Out keyword specifies that the type is co-variable. |
| 20 | Overloads | Specifies a property or procedure to re-declare one or more existing properties or procedures with the same name. |
| 21 | Overridable | Specified properties or procedures can be overridden by properties or procedures in derived classes with the same name. |
| 22 | Overrides | Specifies that a property or procedure overrides the same named property or procedure inherited from the base class. |
| 23 | ParamArray |
ParamArray allows you to pass any number of parameters to the procedure. ParamArray parameters are always declared using ByVal. |
| 24 | Partial | A class or structure declaration is a partial definition of a class or structure. |
| 25 | Private | Programming elements that specify one or more declarations can only be accessed in their claim context, including from any contained type. |
| 26 | Protected | A programmatic element that specifies one or more declarations can only be accessed from its own class or derived class. |
| 27 | Public | There are no access restrictions for programming elements that specify one or more declarations. |
| 28 | ReadOnly | Specify that variables or properties can be read but not written. |
| 29 | Shadows | Specifies that declared programmatic elements are redeclared and hidden in the base class by elements of the same name or a set of overloaded elements. |
| 30 | Shared | Specifies that one or more declared programming elements are associated with a class or structure, not a specific instance of a class or structure. |
| 31 | Static | Specify that one or more declared local variables will continue to exist and retain their latest values after the process of declaring them is terminated. |
| 32 | Unicode | Specify that Visual Basic should group all strings into Unicode values, regardless of the name of the external procedure being declared. |
| 33 | Widening | Represents a conversion operator (CType) that converts a class or structure to a type that holds all possible values of the original class or structure. |
| 34 | WithEvents | Specifies that one or more declared member variables refer to instances of classes that can raise events. |
| 35 | WriteOnly | Specifies that properties can be written but not read. |