The Microsoft Visual Studio .NET logo.Microsoft released Visual Studio .NET in 2002 (the beta version was released on the Microsoft developer network in 2001). The biggest change was the introduction of a managed code development environment using the .NET Framework. Programs developed using .NET are not compiled to machine language (like C++ is, for example) but instead to a format called Microsoft Intermediate Language (MSIL) or Common Intermediate Language (CIL). When an MSIL application is executed, it is compiled while being executed into the appropriate machine language for the platform it is being executed on, thereby making code portable across several platforms. Programs compiled into MSIL can be executed only on platforms which have an implementation of Common Language Infrastructure. It is possible to run MSIL programs in Linux or Mac OS X using non-Microsoft .NET implementations like Mono and DotGNU.
This was the first version of Visual Studio to require an NT-based Windows platform.[2] The installer enforces this requirement.
Microsoft introduced C# (C-sharp), a new programming language, that targets .NET. It also introduced the successor to Visual J++ called Visual J#. Visual J# programs use Java's language syntax. However, unlike Visual J++ programs, Visual J# programs can only target the .NET Framework, not the Java Virtual Machine that all other Java tools target.
Visual Basic was drastically changed to fit the new framework, and the new version was called Visual Basic .NET. Microsoft also added extensions to C++, called Managed Extensions for C++, so that C++ programmers could create .NET programs.
Visual Studio .NET can be used to make applications targeting Windows (using Windows Forms, part of the .NET Framework), Web (using ASP.NET and Web Services) and, with an add-in, portable devices (using the .NET Compact Framework).
The Visual Studio .NET environment was rewritten to partially use .NET. All languages are unified under one environment, except for Visual FoxPro. Compared to previous versions of Visual Studio, it has a cleaner interface and greater cohesiveness. It is also more customizable with tool windows that automatically hide when not in use.
Also in this version, Visual FoxPro was no longer being bundled and is now sold separately.
The internal version number of Visual Studio .NET is version 7.0.
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