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Overloads − Specifies that a property or procedure redeclares one or more existing properties or procedures with the same name.

MustOverride − Specifies that a property or procedure is not implemented in this class and must be overridden in a derived class before it can be used.

#If…Then…#Else − This directive conditionally compiles selected blocks of Visual Basic code.

ByVal − Specifies that an argument is passed in such a way that the called procedure or property cannot change the value of a variable underlying the argument in the calling code.

Iterator − Specifies that a function or Get accessor is an iterator. An iterator performs a custom iteration over a collection.

#Region − This directive helps in collapsing and hiding sections of code in Visual Basic files.

Dim − Declares and allocates storage space for one or more variables.

Auto − The charset modifier part in the Declare statement supplies the character set information for marshaling strings during a call to the external procedure. It also affects how Visual Basic searches the external file for the external procedure name. The Auto modifier specifies that Visual Basic should marshal strings according to .NET Framework rules.

Stack − It represents a last-in, first out collection of object. It is used when you need a last-in, first-out access of items. When you add an item in the list, it is called pushing the item, and when you remove it, it is called popping the item.

CObj(expression) − Converts the expression to Object data type.

Sub − Declares the name, parameters, and code that define a Sub procedure.

CChar(expression) − Converts the expression to Char data type.

Class − Declares the name of a class and introduces the definition of the variables, properties, events, and procedures that the class comprises.

Operator − Declares the operator symbol, operands, and code that define an operator procedure on a class or structure.

Default − Identifies a property as the default property of its class, structure, or interface.

ArrayList − It represents ordered collection of an object that can be indexed individually. It is basically an alternative to an array. However, unlike array, you can add and remove items from a list at a specified position using an index and the array resizes itself automatically. It also allows dynamic memory allocation, add, search and sort items in the list.

If − It uses short-circuit evaluation to conditionally return one of two values. The If operator can be called with three arguments or with two arguments.

CDec(expression) − Converts the expression to Decimal data type.

ByRef − Specifies that an argument is passed by reference, i.e., the called procedure can change the value of a variable underlying the argument in the calling code.

AddressOf − Returns the address of a procedure.