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Pre-processing directives

Pre-processing directives The pre-processing directives provide the ability to conditionally skip sections of source files, to report error and warning conditions, and to delineate distinct regions of source code. The term “pre-processing dire
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Expressions

Expressions C# includes unary operators, binary operators, and one ternary operator. The following table summarizes the operators, listing them in order of precedence from highest to lowest: Section Category
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Member lookup - Base types

Member lookup A member lookup is the process whereby the meaning of a name in the context of a type is determined. A member lookup may occur as part of evaluating a simple-name (§‎7.5.2) or a member-access (§‎7.5.4) in an expression
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Variables and parameters

Variables and parameters Variables represent storage locations. Every variable has a type that determines what values can be stored in the variable. Local variables are variables that are declared in methods, properties, or indexers. A local v
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Namespace declarations

Namespace declarations A namespace-declaration consists of the keyword namespace, followed by a namespace name and body, optionally followed by a semicolon. namespace-declaration: namespace   qualified-identifier   namespace-body   ;opt q
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Operators

Operators An operator is a member that defines the meaning of an expression operator that can be applied to instances of the class. Operators are declared using operator-declarations: operator-declaration: attributesopt   operator-modifiers
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Automatic memory management

Automatic memory management Manual memory management requires developers to manage the allocation and de-allocation of blocks of memory. Manual memory management is both time-consuming and difficult. In C#, automatic memory management is provi
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Attributes - Attribute classes

Attributes Much of the C# language enables the programmer to specify declarative information about the entities defined in the program. For example, the accessibility of a method in a class is specified by decorating it with the method-modifier
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Constant expressions

Expression An expression is either a conditional-expression or an assignment. expression: conditional-expression assignment Constant expressions A constant-expression is an expression that can be fully evaluated at compile-time. co
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Definite assignment

Definite assignment At a given location in the executable code of a function member, a variable is said to be definitely assigned if the compiler can prove, by static flow analysis, that the variable has been automatically initialized or has bee
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Destructors

Destructors A destructor is a member that implements the actions required to destruct an instance of a class. A destructors is declared using a destructor-declaration: destructor-declaration: attributesopt   ~   identifier   (   )    block
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Statements

Statements C# borrows most of its statements directly from C and C++, though there are some noteworthy additions and modifications. The table below lists the kinds of statements that can be used, and provides an example for each.
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Standard conversions

Standard conversions The standard conversions are those pre-defined conversions that can occur as part of a user-defined conversion. Standard implicit conversions The following implicit conversions are classified as standard implicit co
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Structs

Structs The list of similarities between classes and structs is long—structs can implement interfaces, and can have the same kinds of members as classes. Structs differ from classes in several important ways, however: structs are value types ra
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Boxing and unboxing: Boxing conversions

Boxing and unboxing Boxing and unboxing is a central concept in C#’s type system. It provides a bridge between value-types and reference-types by permitting any value of a value-type to be converted to and from type object. Boxing and unboxin
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End points and reachability

End points and reachability Every statement has an end point. In intuitive terms, the end point of a statement is the location that immediately follows the statement. The execution rules for composite statements (statements that contain embedd
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Assignment operators

Assignment operators The assignment operators assign a new value to a variable, a property, or an indexer element. assignment: unary-expression   assignment-operator   expression assignment-operator:  one of =   +=   -=   *=   /=   %=
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Relational and type testing operators

Relational and type testing operators The ==, !=, <, >, <=, >=, is and as operators are called the relational and type testing operators. relational-expression: shift-expression relational-expression   <   shift-expression
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The empty statement

The empty statement An empty-statement does nothing. empty-statement: ; An empty statement is used when there are no operations to perform in a context where a statement is required. Execution of an empty statement simply transfers c
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Static constructors

Static constructors A static constructor is a member that implements the actions required to initialize a class. Static constructors are declared using static-constructor-declarations: static-constructor-declaration: attributesopt   static  
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