Table of C# keywords and Descriptions

C# Keywords Table

C# Keywords Table   Table of C# keywords and Descriptions. C# was a language developed by the Microsoft Corporation in the late 1990’s. It is an object oriented language that resembles both C and Java. The C# keywords reflect it’s origins as an off shoot of the C language. The following C# keywords are the building blocks of the programming language. A C# program is constructed by creating a syntactically and procedurally correct program file that can be compiled by a C# compiler.

Code Description abstract The abstract modifier can be used with classes, methods, properties, indexers, and events. as The as operator is used to perform conversions between compatible types. base The base keyword is used to access members of the base class from within a derived class bool The bool keyword is an alias of System.Boolean. It is used to declare variables to store the Boolean values, true and false. break The break statement terminates the closest enclosing loop or switch statement in which it appears. byte The byte keyword denotes an integral type that stores values as indicated in the following table. case The switch statement is a control statement that handles multiple selections by passing control to one of the case statements within its body. catch The try-catch statement consists of a try block followed by one or more catch clauses, which specify handlers for different exceptions. char The char keyword is used to declare a Unicode character in the range indicated in the following table. checked The checked keyword is used to control the overflow-checking context for integral-type arithmetic operations and conversions. class Classes are declared using the keyword class. const The const keyword is used to modify a declaration of a field or local variable. continue The continue statement passes control to the next iteration of the enclosing iteration statement in which it appears. decimal The decimal keyword denotes a 128-bit data type. default The switch statement is a control statement that handles multiple selections by passing control to one of the case statements within its body. delegate A delegate declaration defines a reference type that can be used to encapsulate a method with a specific signature. do The do statement executes a statement or a block of statements repeatedly until a specified expression evaluates to false. double The double keyword denotes a simple type that stores 64-bit floating-point values. else The if-else statement selects a statement for execution based on the value of a Boolean expression. enum The enum keyword is used to declare an enumeration, a distinct type consisting of a set of named constants called the enumerator list. event Specifies an event. explicit The explicit keyword is used to declare an explicit user-defined type conversion operator extern Use the extern modifier in a method declaration to indicate that the method is implemented externally. false In C#, the false keyword can be used as an overloaded operator or as a literal finally The finally block is useful for cleaning up any resources allocated in the try block. fixed Prevents relocation of a variable by the garbage collector. float The float keyword denotes a simple type that stores 32-bit floating-point values. for The for loop executes a statement or a block of statements repeatedly until a specified expression evaluates to false. foreach The foreach statement repeats a group of embedded statements for each element in an array or an object collection. goto The goto statement transfers the program control directly to a labeled statement. if The if statement selects a statement for execution based on the value of a Boolean expression. implicit The implicit keyword is used to declare an implicit user-defined type conversion operator. in The foreach,in statement repeats a group of embedded statements for each element in an array or an object collection. int The int keyword denotes an integral type that stores values according to the size and range shown in the following table. interface An interface defines a contract. A class or struct that implements an interface must adhere to its contract. internal The internal keyword is an access modifier for types and type members. is The is operator is used to check whether the run-time type of an object is compatible with a given type. lock The lock keyword marks a statement block as a critical section by obtaining the mutual-exclusion lock for a given object, executing a statement, and then releasing the lock. long The long keyword denotes an integral type that stores values according to the size and range shown in the following table. namespace The namespace keyword is used to declare a scope. This namespace scope lets you organize code and gives you a way to create globally-unique types. new In C#, the new keyword can be used as an operator or as a modifier. null The null keyword is a literal that represents a null reference, one that does not refer to any object. object The object type is an alias for System.Object in the .NET Framework. operator The operator keyword is used to declare an operator in a class or struct declaration. out The out method parameter keyword on a method parameter causes a method to refer to the same variable that was passed into the method override Use the override modifier to modify a method, a property, an indexer, or an event. params The params keyword lets you specify a method parameter that takes an argument where the number of arguments is variable. private The private keyword is a member access modifier. protected The protected keyword is a member access modifier. public The public keyword is an access modifier for types and type members. readonly The readonly keyword is a modifier that you can use on fields. ref The ref method parameter keyword on a method parameter causes a method to refer to the same variable that was passed into the method. return The return statement terminates execution of the method in which it appears and returns control to the calling method. sbyte The sbyte keyword denotes an integral type that stores values according to the size and range shown in the following table. sealed A sealed class cannot be inherited. short The short keyword denotes an integral data type that stores values according to the size and range shown in the following table. sizeof The sizeof operator is used to obtain the size in bytes for a value type. stackalloc Allocates a block of memory on the stack. static Use the static modifier to declare a static member, which belongs to the type itself rather than to a specific object. string The string type represents a string of Unicode characters. struct A struct type is a value type that can contain constructors, constants, fields, methods, properties, indexers, operators, events, and nested types. switch The switch statement is a control statement that handles multiple selections by passing control to one of the case statements within its body. this The this keyword refers to the current instance of the class. Static member functions do not have a this pointer. throw The throw statement is used to signal the occurrence of an anomalous situation (exception) during the program execution. true In C#, the true keyword can be used as an overloaded operator or as a literal. try The try-catch statement consists of a try block followed by one or more catch clauses, which specify handlers for different exceptions. typeof The typeof operator is used to obtain the System.Type object for a type. uint The uint keyword denotes an integral type that stores values according to the size and range shown in the following table. ulong The ulong keyword denotes an integral type that stores values according to the size and range shown in the following table. unchecked The unchecked keyword is used to control the overflow-checking context for integral-type arithmetic operations and conversions. unsafe The unsafe keyword denotes an unsafe context, which is required for any operation involving pointers. ushort The ushort keyword denotes an integral data type that stores values according to the size and range shown in the following table. using The using keyword has two major uses. virtual The virtual keyword is used to modify a method or property declaration, in which case the method or the property is called a virtual member. volatile The volatile keyword indicates that a field can be modified in the program by something such as the operating system, the hardware, or a concurrently executing thread. void When used as the return type for a method, void specifies that the method does not return a value. while The while statement executes a statement or a block of statements until a specified expression evaluates to false.