.NET is a general purpose development platform. It has several key features, such as support for multiple
programming languages, asynchronous and concurrent programming models, and native interoperability, which
enable a wide range of scenarios across multiple platforms.
This article offers a guided tour through some of the key features of the .NET. See the .NET Architectural
Components topic to learn about the architectural pieces of .NET and what they're used for.
To learn how to set up a development environment to run the code samples, see the Getting Started topic. Copy
and paste code samples from this page into your environment to execute them.
.NET supports multiple programming languages. The .NET implementations implement the Common Language
Infrastructure
(
CLI
)
, which among other things specifies a language
-
independent runtime and language
interoperability. This means that you choose any .NET language to build apps and services on .NET.
Microsoft actively develops and supports three .NET languages: C#, F#, and Visual Basic
(
VB
)
.
C# is simple, powerful, type
-
safe, and object
-
oriented, while retaining the expressiveness and elegance of C
-
style languages. Anyone familiar with C and similar languages finds few problems in adapting to C#. Check
out the C# Guide to learn more about C#.
F# is a cross
-
platform, functional
-
first programming language that also supports traditional object
-
oriented
and imperative programming. Check out the F# Guide to learn more about F#.
Visual Basic is an easy language to learn that you use to build a variety of apps that run on .NET. Among the
.NET languages, the syntax of VB is the closest to ordinary human language, often making it easier for
people new to software development.
.NET uses garbage collection
(
GC
)
to provide automatic memory management for programs. The GC operates on a
lazy approach to memory management, preferring app throughput to the immediate collection of memory. To learn
more about the .NET GC, check out Fundamentals of garbage collection
(
GC
)
.
The following two lines both allocate memory:
There's no analogous keyword to de
-
allocate memory, as de
-
allocation happens automatically when the garbage
collector reclaims the memory through its scheduled run.
The garbage collector is one of the services that help ensure memory safety. A program is memory safe if it
accesses only allocated memory. For instance, the runtime ensures that an app doesn't access unallocated memory
beyond the bounds of an array.
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