follwing are some new features and
improvements by this framework::

1.Asp dot net dynamic data

2.improvements to the common language runtime(CLR)

3.Windows Presentation Foundation's performance
improves

4.new Entity Framework in the default suite of ADO.NET
technologies for data access

5.new date and file streaming abilities in sql server-
08 as a new support in linq to sql

6.a combination of patterns and libraries in the 'ado
dot net data services framework' enables exposing of
data as Representational State Transfer which may be
consumed by web clients in the internet or the
in corporate networks

7.WCF now making easier to use the datacontract
serializer in many ways

8.new support in .net framework sql server data provider
(sql client)

System Requirements are::
Operating Systems: Win Server 2003,Win Server 2008,Vista,XP
Processor: 400 MHz Pentium processor(Minimum) or equivalent,
1GHz (Recommended)
RAM:Minimum 96MB,recommended 256MB

Download and installation instructions::
go to microsoft website for download dot net framework sp1.
after clicking the download button,a bootstrapper file will
be downloaded first.click it to run and install
.Net framework sp1