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53-666: This technology, introduced in Microsoft SQL Server 2005, allow users for example to create the following types of managed code objects in SQL Server in .NET languages such as C# or VB.NET . The SQL CLR relies on the creation, deployment, and registration of CLI assemblies , which are physically stored in managed code dynamic load libraries (DLLs). These assemblies may contain CLI namespaces, classes, functions and properties. This database software -related article

106-447: A free and open-source project called Mono began, providing a cross-platform compiler and runtime environment for the C# programming language. A decade later, Microsoft released Visual Studio Code (code editor), Roslyn (compiler), and the unified .NET platform (software framework), all of which support C# and are free, open-source, and cross-platform. Mono also joined Microsoft but

159-433: A method of a class with the integer constant of the message to handle. Database connectivity is extensively supported through VCL database-aware and database access components. Later versions have included upgraded and enhanced runtime library routines, some provided by the community group FastCode . Delphi uses a strongly typed high-level programming language , intended to be easy to use and originally based on

212-422: A semitone higher in pitch . This is similar to the language name of C++ , where "++" indicates that a variable should be incremented by 1 after being evaluated. The sharp symbol also resembles a ligature of four "+" symbols (in a two-by-two grid), further implying that the language is an increment of C++. Due to technical limits of display (standard fonts, browsers, etc.), and most keyboard layouts lacking

265-420: A backing field, or implement arbitrary getter and setter functions. A property is read-only if there's no setter. Like with fields, there can be class and instance properties. The underlying methods can be virtual or abstract like any other method. Since C# 3.0 the syntactic sugar of auto-implemented properties is available, where the accessor (getter) and mutator (setter) encapsulate operations on

318-419: A class can implement any number of " interfaces " (fully abstract classes). This was a design decision by the language's lead architect to avoid complications and to simplify architectural requirements throughout CLI. When implementing multiple interfaces that contain a method with the same name and taking parameters of the same type in the same order (i.e. the same signature ), similar to Java , C# allows both

371-595: A code editor, a visual designer, an integrated debugger, a source code control component, and support for third-party plugins . The code editor features Code Insight ( code completion ), Error Insight (real-time error-checking), and refactoring . The visual forms designer has the option of using either the Visual Component Library (VCL) for pure Windows development or the FireMonkey (FMX) framework for cross-platform development. Database support

424-475: A database, parsing an XML file, or searching through a data structure, shifting the emphasis onto the actual program logic to help improve readability and maintainability. C# used to have a mascot called Andy (named after Anders Hejlsberg ). It was retired on January 29, 2004. C# was originally submitted to the ISO/IEC JTC 1 subcommittee SC 22 for review, under ISO/IEC 23270:2003, was withdrawn and

477-603: A function (i.e. hiding the former implementation). To do the latter, you have to specify the new keyword. Extension methods in C# allow programmers to use static methods as if they were methods from a class's method table, allowing programmers to virtually add instance methods to a class that they feel should exist on that kind of objects (and instances of the respective derived classes). The type dynamic allows for run-time method binding, allowing for JavaScript-like method calls and run-time object composition . C# has support for strongly-typed function pointers via

530-421: A newer Delphi version. Third-party libraries typically need updates from the vendor but, if source code is supplied, recompilation with the newer version may be sufficient. The VCL was an early adopter of dependency injection or inversion of control ; it uses a reusable component model, extensible by the developer. With class helpers, new functionality can be introduced to core RTL and VCL classes without changing

583-419: A pointer to the respective object. Due to their special handling of the equality operator, strings will nevertheless behave as if they were values, for all practical purposes. You can even use them as case labels. Where necessary, value types will be boxed automatically. C# supports a strict Boolean data type , bool . Statements that take conditions, such as while and if , require an expression of

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636-591: A sharp symbol ( U+266F ♯ MUSIC SHARP SIGN ( ♯ )), the number sign ( U+0023 # NUMBER SIGN ( # )) was chosen to approximate the sharp symbol in the written name of the programming language. This convention is reflected in the ECMA-334 C# Language Specification. The "sharp" suffix has been used by a number of other .NET languages that are variants of existing languages, including J# (a .NET language also designed by Microsoft that

689-434: A single attribute of a class. A C# namespace provides the same level of code isolation as a Java package or a C++ namespace , with very similar rules and features to a package . Namespaces can be imported with the "using" syntax. In C#, memory address pointers can only be used within blocks specifically marked as unsafe , and programs with unsafe code need appropriate permissions to run. Most object access

742-496: A single method to cover all interfaces and if necessary specific methods for each interface. However, unlike Java, C# supports operator overloading . C# also offers function overloading (a.k.a. ad-hoc-polymorphism). Since version 2.0, C# offers parametric polymorphism , i.e. classes with arbitrary or constrained type parameters, e.g. List<T> , a variable-sized array which only can contain elements of type T . There are certain kinds of constraints you can specify for

795-512: A team to build a new language at the time called Cool, which stood for " C-like Object Oriented Language". Microsoft had considered keeping the name "Cool" as the final name of the language, but chose not to do so for trademark reasons. By the time the .NET project was publicly announced at the July 2000 Professional Developers Conference , the language had been renamed C#, and the class libraries and ASP.NET runtime had been ported to C#. Hejlsberg

848-616: A type that implements the true operator, such as the Boolean type. While C++ also has a Boolean type, it can be freely converted to and from integers, and expressions such as if (a) require only that a is convertible to bool, allowing a to be an int, or a pointer. C# disallows this "integer meaning true or false" approach, on the grounds that forcing programmers to use expressions that return exactly bool can prevent certain types of programming mistakes such as if (a = b) (use of assignment = instead of equality == ). C#

901-690: Is "not a Java clone" and is "much closer to C++" in its design. Since the release of C# 2.0 in November 2005, the C# and Java languages have evolved on increasingly divergent trajectories, becoming two quite different languages. One of the first major departures came with the addition of generics to both languages, with vastly different implementations. C# makes use of reification to provide "first-class" generic objects that can be used like any other class, with code generation performed at class-load time. Furthermore, C# has added several major features to accommodate functional-style programming, culminating in

954-404: Is C#'s principal designer and lead architect at Microsoft, and was previously involved with the design of Turbo Pascal , Embarcadero Delphi (formerly CodeGear Delphi, Inprise Delphi and Borland Delphi), and Visual J++ . In interviews and technical papers, he has stated that flaws in most major programming languages (e.g. C++ , Java , Delphi , and Smalltalk ) drove the fundamentals of

1007-608: Is a general-purpose programming language and a software product that uses the Delphi dialect of the Object Pascal programming language and provides an integrated development environment (IDE) for rapid application development of desktop, mobile , web , and console software, currently developed and maintained by Embarcadero Technologies . Delphi's compilers generate native code for Microsoft Windows , macOS , iOS , Android and Linux ( x64 ). Delphi includes

1060-491: Is a stub . You can help Misplaced Pages by expanding it . C Sharp (programming language) C# ( / ˌ s iː ˈ ʃ ɑːr p / see SHARP ) is a general-purpose high-level programming language supporting multiple paradigms . C# encompasses static typing, strong typing , lexically scoped , imperative , declarative , functional , generic , object-oriented ( class -based), and component-oriented programming disciplines. The principal inventors of

1113-599: Is a key feature and is provided by FireDAC (Database Access Components). Delphi is known for its fast compilation speed, native code, and developer productivity. Delphi was originally developed by Borland as a rapid application development tool for Windows as the successor of Turbo Pascal . Delphi added full object-oriented programming to the existing language, and the language has grown to support generics, anonymous methods , closures , and native Component Object Model (COM) support. Delphi and its C++ counterpart, C++Builder , are interoperable and jointly sold under

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1166-446: Is a member of a class that can be invoked as a function (a sequence of instructions), rather than the mere value-holding capability of a field (i.e. class or instance variable ). As in other syntactically similar languages, such as C++ and ANSI C , the signature of a method is a declaration comprising in order: any optional accessibility keywords (such as private ), the explicit specification of its return type (such as int , or

1219-468: Is also interoperability with Python. Note that the object construct is still available in Delphi. Delphi is the medium used to teach programming in South African schools as a subject of information technology (IT). Embarcadero used to publish "roadmaps" describing their future development plans. The last one was published in November 2020. Version 10.5 referred to in the November 2020 roadmap

1272-413: Is derived from Java 1.1), A# (from Ada ), and the functional programming language F# . The original implementation of Eiffel for .NET was called Eiffel#, a name retired since the full Eiffel language is now supported. The suffix has also been used for libraries , such as Gtk# (a .NET wrapper for GTK and other GNOME libraries) and Cocoa# (a wrapper for Cocoa ). The core syntax of

1325-455: Is done through safe object references, which always either point to a "live" object or have the well-defined null value; it is impossible to obtain a reference to a "dead" object (one that has been garbage collected), or to a random block of memory. An unsafe pointer can point to an instance of an unmanaged value type that does not contain any references to objects subject to garbage collections such as class instances, arrays or strings. Code that

1378-740: Is more type safe than C++. The only implicit conversions by default are those that are considered safe, such as widening of integers. This is enforced at compile-time, during JIT , and, in some cases, at runtime. No implicit conversions occur between Booleans and integers, nor between enumeration members and integers (except for literal 0, which can be implicitly converted to any enumerated type). Any user-defined conversion must be explicitly marked as explicit or implicit, unlike C++ copy constructors and conversion operators, which are both implicit by default. C# has explicit support for covariance and contravariance in generic types, unlike C++ which has some degree of support for contravariance simply through

1431-490: Is not marked as unsafe can still store and manipulate pointers through the System.IntPtr type, but it cannot dereference them. Managed memory cannot be explicitly freed; instead, it is automatically garbage collected. Garbage collection addresses the problem of memory leaks by freeing the programmer of responsibility for releasing memory that is no longer needed in most cases. Code that retains references to objects longer than

1484-550: Is required can still experience higher memory usage than necessary, however once the final reference to an object is released the memory is available for garbage collection. A range of standard exceptions are available to programmers. Methods in standard libraries regularly throw system exceptions in some circumstances and the range of exceptions thrown is normally documented. Custom exception classes can be defined for classes allowing handling to be put in place for particular circumstances as needed. The syntax for handling exceptions

1537-482: Is the following: Depending on your plans, the "finally" part can be left out. If error handling is not required, the (Exception ex) parameter can be omitted as well. Also, there can be several "catch" parts handling different kinds of exceptions. Checked exceptions are not present in C# (in contrast to Java). This has been a conscious decision based on the issues of scalability and versionability. Unlike C++ , C# does not support multiple inheritance , although

1590-676: The IEnumerable<;T> interface is implemented on the object. This includes XML documents, an ADO.NET dataset, and SQL databases. + Using LINQ in C# brings advantages like IntelliSense support, strong filtering capabilities, type safety with compile error checking ability, and consistency for querying data over a variety of sources. There are several different language structures that can be utilized with C# and LINQ and they are query expressions, lambda expressions, anonymous types, implicitly typed variables, extension methods, and object initializers. Delphi (software) Delphi

1643-538: The Common Language Runtime (CLR), which, in turn, drove the design of the C# language. James Gosling , who created the Java programming language in 1994, and Bill Joy , a co-founder of Sun Microsystems , the originator of Java, called C# an "imitation" of Java; Gosling further said that "[C# is] sort of Java with reliability, productivity and security deleted." In July 2000, Hejlsberg said that C#

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1696-487: The LINQ extensions released with C# 3.0 and its supporting framework of lambda expressions , extension methods , and anonymous types . These features enable C# programmers to use functional programming techniques, such as closures , when it is advantageous to their application. The LINQ extensions and the functional imports help developers reduce the amount of boilerplate code that is included in common tasks like querying

1749-718: The Pascal -based programming language Object Pascal created by Anders Hejlsberg for Borland (now IDERA) as the successor to Turbo Pascal. It supports native cross-compilation to many platforms including Windows, Linux, iOS, and Android. To better support development for Microsoft Windows and interoperate with code developed with other software development tools, Delphi supports independent interfaces of Component Object Model (COM) with reference counting class implementations, and support for many third-party components. Interface implementations can be delegated to fields or properties of classes. Message handlers are implemented by tagging

1802-474: The '+' operator, rather than using functions. For dedicated string types, Delphi handles memory management without programmer intervention. Since Borland Developer Studio 2006, there are functions to locate memory leaks . Delphi includes an integrated IDE. The Delphi products all ship with a run-time library (RTL) and a Visual Component Library (VCL), including most of its source code. Third-party components (sometimes with full source code ) and tools to enhance

1855-421: The C# language is similar to that of other C-style languages such as C, C++ and Java, particularly: Some notable features of C# that distinguish it from C, C++, and Java where noted, are: By design, C# is the programming language that most directly reflects the underlying Common Language Infrastructure  (CLI). Most of its intrinsic types correspond to value-types implemented by the CLI framework. However,

1908-473: The C# programming language were Anders Hejlsberg , Scott Wiltamuth, and Peter Golde from Microsoft . It was first widely distributed in July 2000 and was later approved as an international standard by Ecma (ECMA-334) in 2002 and ISO / IEC (ISO/IEC 23270 and 20619 ) in 2003. Microsoft introduced C# along with .NET Framework and Visual Studio , both of which were closed-source . At the time, Microsoft had no open-source products. Four years later, in 2004,

1961-455: The IDE or for other Delphi related development tasks are available, some free of charge. The IDE includes a GUI for localization and translation of created programs that may be deployed to a translator; there are also third-party tools with more features for this purpose. The VCL framework maintains a high level of source compatibility between versions, which simplifies updating existing source code to

2014-509: The IDE, the VCL and FMX frameworks, and much of the runtime library . In addition, they can be used jointly in a project. For example, C++Builder 6 and later can combine source code from Delphi and C++ in one project, while packages compiled with C++Builder can be used from within Delphi. In 2007, the products were released jointly as RAD Studio, a shared host for Delphi and C++Builder, which can be purchased with either or both. Starting with Rio, there

2067-468: The calling site, and you can choose between ref and out , the latter allowing handing over an uninitialized variable which will have a definite value on return. Additionally, you can specify a variable-sized argument list by applying the params keyword to the last parameter. Certain specific kinds of methods, such as those that simply get or set a field's value by returning or assigning it, do not require an explicitly stated full signature, but in

2120-473: The earlier Object Pascal language. Pascal was originally developed as a general-purpose language "suitable for expressing the fundamental constructs known at the time in a concise and logical way", and "its implementation was to be efficient and competitive with existing FORTRAN compilers" but without low-level programming facilities or access to hardware. Turbo Pascal and its descendants, including Delphi, support access to hardware and low-level programming, with

2173-565: The facility to incorporate code written in assembly language and other languages. Delphi's object-orientation features only class- and interface-based polymorphism . Metaclasses are first class objects. Objects are references to the objects (as in Java ), which Delphi implicitly de-references, so there is usually no need to manually allocate memory for pointers to objects or use similar techniques that some other languages need. There are dedicated reference-counted string types, and also null-terminated strings. Strings can be concatenated by using

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2226-404: The general case, the definition of a class includes the full signature declaration of its methods. Like C++, and unlike Java, C# programmers must use the scope modifier keyword virtual to allow methods to be overridden by subclasses. Unlike C++, you have to explicitly specify the keyword override when doing so. This is supposed to avoid confusion between overriding and newly overloading

2279-526: The keyword delegate . Like the Qt framework's pseudo-C++ signal and slot , C# has semantics specifically surrounding publish-subscribe style events, though C# uses delegates to do so. C# offers Java-like synchronized method calls, via the attribute [MethodImpl(MethodImplOptions.Synchronized)] , and has support for mutually-exclusive locks via the keyword lock . C# supports classes with properties . The properties can be simple accessor functions with

2332-402: The keyword var , and implicitly typed arrays with the keyword new[] followed by a collection initializer. Its type system is split into two families: Value types, like the built-in numeric types and user-defined structs, which are automatically handed over as copies when used as parameters, and reference types, including arrays, instances of classes, and strings, which only hand over

2385-403: The keyword void if no value is returned), the name of the method, and finally, a parenthesized sequence of comma-separated parameter specifications, each consisting of a parameter's type, its formal name and optionally, a default value to be used whenever none is provided. Different from most other languages, call-by-reference parameters have to be marked both at the function definition and at

2438-432: The language specification does not state the code generation requirements of the compiler: that is, it does not state that a C# compiler must target a Common Language Runtime, or generate Common Intermediate Language (CIL), or generate any other specific format. Some C# compilers can also generate machine code like traditional compilers of C++ or Fortran . C# supports strongly, implicitly typed variable declarations with

2491-541: The name RAD Studio. There are Professional, Enterprise, and Architect editions, with the higher editions having more features at a higher price. There is also a free-of-charge Community edition, with most of the features of Professional, but restricted to users and companies with low revenue. Delphi supports rapid application development (RAD). Prominent features are a visual designer and two application frameworks , Visual Component Library (VCL) for Windows and FireMonkey (FMX) for cross-platform development. Delphi uses

2544-453: The original source code of the RTL or VCL. The compiler is optimizing and is a single-pass compiler . It can optionally compile to a single executable which does not require DLLs . Delphi can also generate standard DLLs, ActiveX DLLs, COM automation servers and Windows services . The Delphi IDEs since Delphi 2005 increasingly support refactoring features such as method extraction and

2597-866: The possibility to create UML models from the source code or to modify the source through changes made in the model. Delphi has communities on the web , where also its employees actively participate. Delphi is one of the languages where backward compatibility is close to 100%. Although each new release of Delphi attempts to keep as much backward compatibility as possible to allow existing code reuse, new features, new libraries, and improvements sometimes make newer releases less than 100% backward compatible. Since 2016, there have been new releases of Delphi every six months, with new platforms being added approximately every second release. Delphi offers two frameworks for visual application development, VCL and FireMonkey (FMX): Delphi and its C++ counterpart, C++Builder , are interoperable. They share many core components, notably

2650-473: The semantics of return types on virtual methods. Enumeration members are placed in their own scope . The C# language does not allow for global variables or functions. All methods and members must be declared within classes. Static members of public classes can substitute for global variables and functions. Local variables cannot shadow variables of the enclosing block, unlike C and C++. Metaprogramming can be achieved in several ways: A method in C#

2703-413: The type parameters: Has to be type X ( or one derived from it ), has to implement a certain interface, has to be a reference type, has to be a value type, has to implement a public parameterless constructor . Most of them can be combined, and you can specify any number of interfaces. C# has the ability to utilize LINQ through the .NET Framework. A developer can query a variety of data sources, provided

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2756-416: Was not merged into .NET. As of November 2024, the most recent stable version of the language is C# 13.0, which was released in 2024 in .NET 9.0. The Ecma standard lists these design goals for C#: During the development of the .NET Framework , the class libraries were originally written using a managed code compiler system named Simple Managed C (SMC). In January 1999, Anders Hejlsberg formed

2809-429: Was then approved under ISO/IEC 23270:2006. The 23270:2006 is withdrawn under 23270:2018 and approved with this version. Microsoft first used the name C# in 1988 for a variant of the C language designed for incremental compilation. That project was not completed, and the name was later reused. The name "C sharp" was inspired by the musical notation whereby a sharp symbol indicates that the written note should be made

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