Automatic memory management

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Managed C++ (a dialect of Visual C++). There are many vendors that are
working on developing language compilers for other languages (20+ language
compilers are already available). The beauty of multi language support lies in the
fact that even though the syntax of each language is different, the basic
capabilities of each language remain at par with one another.

Multi-Device Support

Modern lift style is increasingly embracing mobile and wireless devices such as
PDAs, mobiles and handheld PCs. . . .NET provides promising platform for
programming such devices. .NET Compact Framework and Mobile Internet
Toolkit are step ahead in this direction.

Automatic memory management

While developing applications developers had to develop an eye on system
resources like memory. Memory leaks were major reason in failure of
applications. .NET takes this worry away from developer by handling memory on
its own. The garbage collector takes care of freeing unused objects at appropriate
intervals.

Compatibility with COM and COM+

Before the introduction of .NET, COM was the de-facto standard for
componentized software development. Companies have invested lot of money and
efforts in developing COM components and controls. The good news is you can
still use COM components and ActiveX controls under .NET. This allows you to
use your existing investment in .NET applications. .NET still relies on COM+ for
features like transaction management and object pooling. In fact it provides
enhanced declarative support for configuring COM+ application right from your
source code. Your COM+ knowledge still remains as a valuable asset.

No more DLL Hell

If you have worked with COM components, you probably are aware of "DLL
hell". DLL conflicts are a common fact in COM world. The main reason behind
this was the philosophy of COM "one version of component across machine".
Also, COM components require registration in the system registry. .NET ends this
DLL hell by allowing applications to use their own copy of dependent DLLs.
Also, .NET components do not require any kind of registration in system registry.

Strong XML support

Now days it is hard to find a programmer who is unaware of XML. XML has
gained such a strong industry support that almost all the vendors have released
some kind of upgrades or patches to their existing software to make it "XML
compatible". Currently, .NET is the only platform that has built with XML right
into the core framework. .NET tries to harness power of XML in every possible
way. In addition to providing support for manipulating and transforming XML
documents, .NET provides XML web services that are based on standards like
HTTP, XML and SOAP.