<s>
Microsoft	O
started	O
development	O
on	O
the	O
.NET	B-Application
Framework	I-Application
in	O
the	O
late	O
1990s	O
originally	O
under	O
the	O
name	O
of	O
Next	B-Application
Generation	I-Application
Windows	I-Application
Services	I-Application
(	O
NGWS	B-Application
)	O
.	O
</s>
<s>
By	O
late	O
2001	O
the	O
first	O
beta	O
versions	O
of	O
.NET	B-Application
Framework	I-Application
1.0	O
were	O
released	O
.	O
</s>
<s>
The	O
first	O
version	O
of	O
.NET	B-Application
Framework	I-Application
was	O
released	O
on	O
13	O
February	O
2002	O
,	O
bringing	O
managed	O
code	O
to	O
Windows	B-Device
NT	I-Device
4.0	I-Device
,	O
98	B-Device
,	O
2000	B-Application
,	O
ME	B-Device
and	O
XP	B-Application
.	O
</s>
<s>
Since	O
the	O
first	O
version	O
,	O
Microsoft	O
has	O
released	O
nine	O
more	O
upgrades	O
for	O
.NET	B-Application
Framework	I-Application
,	O
seven	O
of	O
which	O
have	O
been	O
released	O
along	O
with	O
a	O
new	O
version	O
of	O
Visual	B-Application
Studio	I-Application
.	O
</s>
<s>
Two	O
of	O
these	O
upgrades	O
,	O
.NET	B-Application
Framework	I-Application
2.0	O
and	O
4.0	O
,	O
have	O
upgraded	O
Common	O
Language	O
Runtime	O
(	O
CLR	O
)	O
.	O
</s>
<s>
New	O
versions	O
of	O
.NET	B-Application
Framework	I-Application
replace	O
older	O
versions	O
when	O
the	O
CLR	O
version	O
is	O
the	O
same	O
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
family	O
also	O
includes	O
two	O
versions	O
for	O
mobile	O
or	O
embedded	B-Architecture
device	I-Architecture
use	O
.	O
</s>
<s>
A	O
reduced	O
version	O
of	O
the	O
framework	O
,	O
the	O
.NET	B-Operating_System
Compact	I-Operating_System
Framework	I-Operating_System
,	O
is	O
available	O
on	O
Windows	B-Operating_System
CE	I-Operating_System
platforms	O
,	O
including	O
Windows	B-Operating_System
Mobile	I-Operating_System
devices	O
such	O
as	O
smartphones	B-Application
.	O
</s>
<s>
Additionally	O
,	O
the	O
.NET	B-Application
Micro	I-Application
Framework	I-Application
is	O
targeted	O
at	O
severely	O
resource-constrained	O
devices	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.8	O
was	O
announced	O
as	O
the	O
final	O
version	O
of	O
.NET	B-Application
Framework	I-Application
,	O
with	O
future	O
work	O
going	O
into	O
the	O
rewritten	O
and	O
cross-platform	B-Operating_System
.NET	B-Application
Core	I-Application
platform	O
(	O
later	O
,	O
simply	O
.NET	B-Application
)	O
,	O
which	O
shipped	O
as	O
.NET	B-Application
5	I-Application
in	O
November	O
2020	O
.	O
</s>
<s>
However	O
,	O
.NET	B-Application
Framework	I-Application
4.8.1	O
was	O
released	O
in	O
August	O
2022	O
.	O
</s>
<s>
The	O
first	O
version	O
of	O
the	O
.NET	B-Application
Framework	I-Application
was	O
released	O
on	O
15	O
January	O
2002	O
for	O
Windows	B-Device
98	I-Device
,	O
ME	B-Device
,	O
NT	B-Device
4.0	I-Device
,	O
2000	B-Application
,	O
and	O
XP	B-Application
.	O
</s>
<s>
Mainstream	O
support	O
for	O
this	O
version	O
ended	O
on	O
10	B-Operating_System
July	O
2007	O
,	O
and	O
extended	O
support	O
ended	O
on	O
14	O
July	O
2009	O
,	O
with	O
the	O
exception	O
of	O
Windows	B-Application
XP	I-Application
Media	I-Application
Center	I-Application
and	O
Tablet	O
PC	O
editions	O
.	O
</s>
<s>
On	O
19	O
June	O
2001	O
,	O
the	O
tenth	O
anniversary	O
of	O
the	O
release	O
of	O
Visual	B-Language
Basic	I-Language
,	O
.NET	B-Application
Framework	I-Application
1.0	O
Beta	O
2	O
was	O
released	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
1.0	O
is	O
supported	O
on	O
Windows	B-Device
98	I-Device
,	O
ME	B-Device
,	O
NT	B-Device
4.0	I-Device
(	O
with	O
Service	O
Pack	O
6a	O
)	O
,	O
2000	B-Application
,	O
XP	B-Application
,	O
and	O
Server	B-Application
2003	I-Application
.	O
</s>
<s>
Applications	O
utilizing	O
.NET	B-Application
Framework	I-Application
1.0	O
will	O
also	O
run	O
on	O
computers	O
with	O
.NET	B-Application
Framework	I-Application
1.1	O
installed	O
,	O
which	O
supports	O
additional	O
operating	O
systems	O
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
1.0	O
Service	O
Pack	O
1	O
was	O
released	O
on	O
19	O
March	O
2002	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
1.0	O
Service	O
Pack	O
2	O
was	O
released	O
on	O
7	B-Device
August	O
2002	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
1.0	O
Service	O
Pack	O
3	O
was	O
released	O
on	O
30	O
August	O
2004	O
.	O
</s>
<s>
Version	O
1.1	O
is	O
the	O
first	O
minor	O
.NET	B-Application
Framework	I-Application
upgrade	O
.	O
</s>
<s>
It	O
is	O
available	O
on	O
its	O
own	O
as	O
a	O
redistributable	B-License
package	I-License
or	O
in	O
a	O
software	B-Application
development	I-Application
kit	I-Application
,	O
and	O
was	O
published	O
on	O
3	O
April	O
2003	O
.	O
</s>
<s>
It	O
is	O
also	O
part	O
of	O
the	O
second	O
release	O
of	O
Visual	B-Application
Studio	I-Application
.NET	B-Application
2003	O
.	O
</s>
<s>
This	O
is	O
the	O
first	O
version	O
of	O
the	O
.NET	B-Application
Framework	I-Application
to	O
be	O
included	O
as	O
part	O
of	O
the	O
Windows	O
operating	O
system	O
,	O
shipping	O
with	O
Windows	B-Application
Server	I-Application
2003	I-Application
.	O
</s>
<s>
Mainstream	O
support	O
for	O
.NET	B-Application
Framework	I-Application
1.1	O
ended	O
on	O
14	O
October	O
2008	O
,	O
and	O
extended	O
support	O
ended	O
on	O
8	B-Application
October	O
2013	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
1.1	O
provides	O
full	O
backward	B-General_Concept
compatibility	I-General_Concept
to	O
version	O
1.0	O
,	O
except	O
in	O
rare	O
instances	O
where	O
an	O
application	O
will	O
not	O
run	O
because	O
it	O
checks	O
the	O
version	O
number	O
of	O
a	O
library	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
1.1	O
is	O
supported	O
on	O
Windows	B-Device
98	I-Device
,	O
ME	B-Device
,	O
NT	B-Device
4.0	I-Device
(	O
with	O
Service	O
Pack	O
6a	O
)	O
,	O
2000	B-Application
,	O
XP	B-Application
,	O
Server	B-Application
2003	I-Application
,	O
Vista	B-Application
,	O
and	O
Server	B-Device
2008	I-Device
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
1.1	O
Service	O
Pack	O
1	O
was	O
released	O
on	O
30	O
August	O
2004	O
.	O
</s>
<s>
It	O
requires	O
Windows	B-Device
NT	I-Device
4.0	I-Device
SP6a	O
plus	O
Windows	B-Application
Installer	I-Application
2.0	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Device
NT	I-Device
4.0	I-Device
SP6a	O
,	O
Windows	B-Application
2000	I-Application
RTM-SP2	O
and	O
Windows	B-Application
XP	I-Application
RTM-SP1	O
.	O
</s>
<s>
It	O
was	O
also	O
released	O
along	O
with	O
Visual	B-Application
Studio	I-Application
2005	O
,	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
2005	O
,	O
and	O
BizTalk	B-Application
2006	O
.	O
</s>
<s>
A	O
software	B-Application
development	I-Application
kit	I-Application
for	O
this	O
version	O
was	O
released	O
on	O
29	O
November	O
2006	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Device
98	I-Device
,	O
Windows	B-Application
2000	I-Application
SP3	O
,	O
Windows	B-Device
ME	I-Device
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
RTM	O
.	O
</s>
<s>
Not	O
to	O
be	O
confused	O
with	O
.NET	B-Application
Standard	O
2.0	O
,	O
announced	O
in	O
August	O
14	O
,	O
2017	O
.	O
</s>
<s>
A	O
new	O
hosting	O
API	B-Application
for	O
native	O
applications	O
wishing	O
to	O
host	O
an	O
instance	O
of	O
the	O
.NET	B-Application
runtime	O
:	O
The	O
new	O
API	B-Application
gives	O
a	O
fine	O
grain	O
control	O
on	O
the	O
behavior	O
of	O
the	O
runtime	O
with	O
regards	O
to	O
multithreading	B-General_Concept
,	O
memory	O
allocation	O
and	O
assembly	O
loading	O
.	O
</s>
<s>
It	O
was	O
initially	O
developed	O
to	O
efficiently	O
host	O
the	O
runtime	O
in	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
,	O
which	O
implements	O
its	O
own	O
scheduler	O
and	O
memory	O
manager	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
2.0	O
is	O
supported	O
on	O
Windows	B-Device
98	I-Device
,	O
ME	B-Device
,	O
2000	B-Application
(	O
with	O
Service	O
Pack	O
3	O
or	O
higher	O
)	O
,	O
XP	B-Application
(	O
with	O
Service	O
Pack	O
2	O
or	O
higher	O
)	O
,	O
Server	B-Application
2003	I-Application
,	O
Server	B-Device
2008	I-Device
and	O
Server	B-Device
2008	I-Device
R2	I-Device
.	O
</s>
<s>
Applications	O
utilizing	O
.NET	B-Application
Framework	I-Application
2.0	O
will	O
also	O
run	O
on	O
computers	O
with	O
.NET	B-Application
Framework	I-Application
3.0	O
or	O
3.5	O
installed	O
,	O
which	O
supports	O
additional	O
operating	O
systems	O
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
2.0	O
Service	O
Pack	O
1	O
was	O
released	O
on	O
19	O
November	O
2007	O
.	O
</s>
<s>
It	O
requires	O
Windows	B-Application
2000	I-Application
with	O
SP4	O
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
2.0	O
Service	O
Pack	O
2	O
was	O
released	O
on	O
11	O
August	O
2008	O
.	O
</s>
<s>
It	O
requires	O
Windows	B-Application
2000	I-Application
with	O
SP4	O
plus	O
KB835732	O
or	O
KB891861	O
update	O
,	O
Windows	B-Application
XP	I-Application
with	O
SP2	O
plus	O
Windows	B-Application
Installer	I-Application
3.1	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
2000	I-Application
SP4	O
although	O
there	O
have	O
been	O
some	O
unofficial	O
workarounds	O
to	O
use	O
a	O
subset	O
of	O
the	O
functionality	O
from	O
Version	O
3.5	O
in	O
Windows	B-Application
2000	I-Application
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
3.0	O
,	O
formerly	O
called	O
WinFX	O
,	O
was	O
released	O
on	O
6	O
November	O
2006	O
.	O
</s>
<s>
It	O
includes	O
a	O
new	O
set	O
of	O
managed	O
code	O
APIs	B-Application
that	O
are	O
an	O
integral	O
part	O
of	O
Windows	B-Application
Vista	I-Application
and	O
Windows	B-Device
Server	I-Device
2008	I-Device
.	O
</s>
<s>
It	O
is	O
also	O
available	O
for	O
Windows	B-Application
XP	I-Application
SP2	O
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
as	O
a	O
download	O
.	O
</s>
<s>
There	O
are	O
no	O
major	O
architectural	O
changes	O
included	O
with	O
this	O
release	O
;	O
.NET	B-Application
Framework	I-Application
3.0	O
uses	O
the	O
same	O
CLR	O
as	O
.NET	B-Application
Framework	I-Application
2.0	O
.	O
</s>
<s>
Unlike	O
the	O
previous	O
major	O
.NET	B-Application
releases	O
there	O
was	O
no	O
.NET	B-Operating_System
Compact	I-Operating_System
Framework	I-Operating_System
release	O
made	O
as	O
a	O
counterpart	O
of	O
this	O
version	O
.	O
</s>
<s>
Version	O
3.0	O
of	O
the	O
.NET	B-Application
Framework	I-Application
shipped	O
with	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
It	O
also	O
shipped	O
with	O
Windows	B-Device
Server	I-Device
2008	I-Device
as	O
an	O
optional	O
component	O
(	O
disabled	O
by	O
default	O
)	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
3.0	O
consists	O
of	O
four	O
major	O
new	O
components	O
:	O
</s>
<s>
.NET	B-Application
Framework	I-Application
3.0	O
is	O
supported	O
on	O
Windows	B-Application
XP	I-Application
,	O
Server	B-Application
2003	I-Application
,	O
Vista	B-Application
,	O
Server	B-Device
2008	I-Device
,	O
and	O
Server	B-Device
2008	I-Device
R2	I-Device
.	O
</s>
<s>
Applications	O
utilizing	O
.NET	B-Application
Framework	I-Application
3.0	O
will	O
also	O
run	O
on	O
computers	O
with	O
.NET	B-Application
Framework	I-Application
3.5	O
installed	O
,	O
which	O
supports	O
additional	O
operating	O
systems	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
3.0	O
Service	O
Pack	O
1	O
was	O
released	O
on	O
19	O
November	O
2007	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
3.0	O
Service	O
Pack	O
2	O
was	O
released	O
on	O
11	O
August	O
2008	O
.	O
</s>
<s>
Version	O
3.5	O
of	O
the	O
.NET	B-Application
Framework	I-Application
was	O
released	O
on	O
19	O
November	O
2007	O
.	O
</s>
<s>
As	O
with	O
.NET	B-Application
Framework	I-Application
3.0	O
,	O
version	O
3.5	O
uses	O
Common	O
Language	O
Runtime	O
(	O
CLR	O
)	O
2.0	O
,	O
that	O
is	O
,	O
the	O
same	O
version	O
as	O
.NET	B-Application
Framework	I-Application
version	O
2.0	O
.	O
</s>
<s>
In	O
addition	O
,	O
.NET	B-Application
Framework	I-Application
3.5	O
also	O
installs	O
.NET	B-Application
Framework	I-Application
2.0	O
SP1	O
and	O
3.0	O
SP1	O
(	O
with	O
the	O
later	O
3.5	O
SP1	O
instead	O
installing	O
2.0	O
SP2	O
and	O
3.0	O
SP2	O
)	O
,	O
which	O
adds	O
some	O
methods	O
and	O
properties	O
to	O
the	O
BCL	O
classes	O
in	O
version	O
2.0	O
which	O
are	O
required	O
for	O
version	O
3.5	O
features	O
such	O
as	O
Language	B-Language
Integrated	I-Language
Query	I-Language
(	O
LINQ	B-Language
)	O
.	O
</s>
<s>
As	O
with	O
previous	O
versions	O
,	O
a	O
new	O
.NET	B-Operating_System
Compact	I-Operating_System
Framework	I-Operating_System
3.5	O
was	O
released	O
in	O
tandem	O
with	O
this	O
update	O
in	O
order	O
to	O
provide	O
support	O
for	O
additional	O
features	O
on	O
Windows	B-Operating_System
Mobile	I-Operating_System
and	O
Windows	B-Operating_System
Embedded	I-Operating_System
CE	I-Operating_System
devices	O
.	O
</s>
<s>
The	O
source	O
code	O
of	O
the	O
Framework	B-Library
Class	I-Library
Library	I-Library
in	O
this	O
version	O
has	O
been	O
partially	O
released	O
(	O
for	O
debugging	O
reference	O
only	O
)	O
under	O
the	O
Microsoft	O
Reference	O
Source	O
License	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
3.5	O
is	O
supported	O
on	O
Windows	B-Application
XP	I-Application
(	O
with	O
Service	O
Pack	O
2	O
or	O
higher	O
)	O
,	O
Server	B-Application
2003	I-Application
(	O
with	O
Service	O
Pack	O
1	O
or	O
higher	O
)	O
,	O
Vista	B-Application
,	O
Server	B-Device
2008	I-Device
,	O
7	B-Device
,	O
Server	B-Device
2008	I-Device
R2	I-Device
,	O
8	B-Application
,	O
Server	B-Device
2012	I-Device
,	O
8.1	B-Device
,	O
Server	B-Device
2012	I-Device
R2	O
,	O
10	B-Operating_System
,	O
and	O
Server	B-Device
2016	I-Device
.	O
</s>
<s>
Starting	O
from	O
Windows	B-Application
8	I-Application
,	O
.NET	B-Application
Framework	I-Application
3.5	O
is	O
an	O
optional	O
feature	O
that	O
can	O
be	O
turned	O
on	O
or	O
off	O
in	O
control	O
panel	O
.	O
</s>
<s>
Although	O
.NET	B-Application
Framework	I-Application
3.5	O
is	O
over	O
10	B-Operating_System
years	O
old	O
,	O
it	O
is	O
also	O
shipped	O
as	O
Windows	O
Container	B-Application
image	O
,	O
allowing	O
old	O
applications	O
that	O
based	O
on	O
.NET	B-Application
Framework	I-Application
2.0	O
–	O
3.5	O
to	O
run	O
in	O
container	B-Application
environment	O
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
3.5	O
Service	O
Pack	O
1	O
was	O
released	O
on	O
11	O
August	O
2008	O
.	O
</s>
<s>
Two	O
new	O
data	O
service	O
components	O
have	O
been	O
added	O
,	O
the	O
ADO.NET	B-Application
Entity	I-Application
Framework	I-Application
and	O
ADO.NET	B-Device
Data	I-Device
Services	I-Device
.	O
</s>
<s>
Two	O
new	O
assemblies	O
for	O
web	O
development	O
,	O
System.WebAbstraction	O
and	O
System.WebRouting	O
,	O
have	O
been	O
added	O
;	O
these	O
are	O
used	O
in	O
the	O
ASP.NET	B-Language
MVC	I-Language
framework	I-Language
and	O
,	O
reportedly	O
,	O
will	O
be	O
used	O
in	O
the	O
future	O
release	O
of	O
ASP.NET	B-Application
Forms	O
applications	O
.	O
</s>
<s>
Service	O
Pack	O
1	O
is	O
included	O
with	O
SQL	O
Server	B-Device
2008	I-Device
and	O
Visual	B-Application
Studio	I-Application
2008	I-Application
Service	I-Application
Pack	I-Application
1	I-Application
.	O
</s>
<s>
It	O
also	O
featured	O
a	O
new	O
set	O
of	O
controls	O
called	O
"	O
Visual	B-Language
Basic	I-Language
Power	O
Packs	O
"	O
which	O
brought	O
back	O
Visual	B-Language
Basic	I-Language
controls	I-Language
such	O
as	O
"	O
Line	O
"	O
and	O
"	O
Shape.	O
"	O
</s>
<s>
Version	O
3.5	O
SP1	O
of	O
the	O
.NET	B-Application
Framework	I-Application
shipped	O
with	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
It	O
also	O
shipped	O
with	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	I-Device
as	O
an	O
optional	O
component	O
(	O
disabled	O
by	O
default	O
)	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
XP	I-Application
SP2	O
,	O
Windows	B-Application
Server	I-Application
2003	I-Application
SP1	O
and	O
Windows	B-Application
Vista	I-Application
RTM	O
.	O
</s>
<s>
For	O
the	O
.NET	B-Application
Framework	I-Application
3.5	O
SP1	O
there	O
is	O
also	O
a	O
new	O
variant	O
of	O
the	O
.NET	B-Application
Framework	I-Application
,	O
called	O
the	O
"	O
.NET	B-Application
Framework	I-Application
Client	O
Profile	O
"	O
,	O
which	O
at	O
28MB	O
is	O
significantly	O
smaller	O
than	O
the	O
full	O
framework	O
and	O
only	O
installs	O
components	O
that	O
are	O
the	O
most	O
relevant	O
to	O
desktop	B-Device
applications	O
.	O
</s>
<s>
However	O
,	O
the	O
Client	O
Profile	O
amounts	O
to	O
this	O
size	O
only	O
if	O
using	O
the	O
online	O
installer	O
on	O
Windows	B-Application
XP	I-Application
SP2	O
when	O
no	O
other	O
.NET	B-Application
Frameworks	I-Application
are	O
installed	O
or	O
using	O
Windows	O
Update	O
.	O
</s>
<s>
Parallel	B-Library
Extensions	I-Library
to	O
improve	O
support	O
for	O
parallel	B-Operating_System
computing	I-Operating_System
,	O
which	O
target	O
multi-core	B-Architecture
or	O
distributed	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
To	O
this	O
end	O
,	O
technologies	O
like	O
PLINQ	O
(	O
Parallel	O
LINQ	B-Language
)	O
,	O
a	O
parallel	O
implementation	O
of	O
the	O
LINQ	B-Language
engine	O
,	O
and	O
Task	O
Parallel	O
Library	O
,	O
which	O
exposes	O
parallel	O
constructs	O
via	O
method	O
calls	O
,	O
are	O
included	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.0	O
is	O
supported	O
on	O
Windows	B-Application
XP	I-Application
(	O
with	O
Service	O
Pack	O
3	O
)	O
,	O
Windows	B-Application
Server	I-Application
2003	I-Application
(	O
with	O
Service	O
Pack	O
2	O
)	O
,	O
Vista	B-Application
(	O
with	O
Service	O
Pack	O
1	O
or	O
higher	O
)	O
,	O
Server	B-Device
2008	I-Device
,	O
7	B-Device
and	O
Server	B-Device
2008	I-Device
R2	I-Device
.	O
</s>
<s>
Applications	O
utilizing	O
.NET	B-Application
Framework	I-Application
4.0	O
will	O
also	O
run	O
on	O
computers	O
with	O
.NET	B-Application
Framework	I-Application
4.5	O
or	O
4.6	O
installed	O
,	O
which	O
supports	O
additional	O
operating	O
systems	O
.	O
</s>
<s>
Support	O
for	O
.NET	B-Application
Framework	I-Application
4.0	O
ended	O
on	O
12	O
April	O
2016	O
and	O
is	O
no	O
longer	O
providing	O
technical	O
support	O
,	O
bug	O
fixes	O
,	O
or	O
security	O
fixes	O
for	O
.NET	B-Application
Framework	I-Application
4.0	O
vulnerabilities	O
which	O
may	O
be	O
subsequently	O
reported	O
or	O
discovered	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
XP	I-Application
SP3	O
,	O
Windows	B-Application
Server	I-Application
2003	I-Application
SP2	O
,	O
Windows	B-Application
Vista	I-Application
SP1	O
,	O
Windows	B-Device
Server	I-Device
2008	I-Device
RTM	O
,	O
Windows	B-Device
7	I-Device
RTM	O
and	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	I-Device
RTM	O
.	O
</s>
<s>
Microsoft	O
announced	O
the	O
intention	O
to	O
ship	O
.NET	B-Application
Framework	I-Application
4	O
on	O
29	O
September	O
2008	O
.	O
</s>
<s>
On	O
28	O
July	O
2009	O
,	O
a	O
second	O
release	O
of	O
the	O
.NET	B-Application
Framework	I-Application
4	O
beta	O
was	O
made	O
available	O
with	O
experimental	O
software	B-Operating_System
transactional	I-Operating_System
memory	I-Operating_System
support	O
.	O
</s>
<s>
On	O
19	O
October	O
2009	O
,	O
Microsoft	O
released	O
Beta	O
2	O
of	O
the	O
.NET	B-Application
Framework	I-Application
4	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
Microsoft	O
announced	O
the	O
expected	O
launch	O
date	O
for	O
.NET	B-Application
Framework	I-Application
4	O
as	O
22	O
March	O
2010	O
.	O
</s>
<s>
On	O
10	B-Operating_System
February	O
2010	O
,	O
a	O
release	O
candidate	O
was	O
published	O
:	O
Version:RC	O
.	O
</s>
<s>
On	O
12	O
April	O
2010	O
,	O
the	O
final	O
version	O
of	O
.NET	B-Application
Framework	I-Application
4.0	O
was	O
launched	O
alongside	O
the	O
final	O
release	O
of	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
2010	O
.	O
</s>
<s>
On	O
18	O
April	O
2011	O
,	O
version	O
4.0.1	O
was	O
released	O
supporting	O
some	O
customer-demanded	O
fixes	O
for	O
Windows	O
Workflow	B-Operating_System
Foundation	O
.	O
</s>
<s>
Its	O
design-time	O
component	O
,	O
which	O
requires	O
Visual	B-Application
Studio	I-Application
2010	O
SP1	O
,	O
adds	O
a	O
workflow	B-Operating_System
state	O
machine	O
designer	O
.	O
</s>
<s>
On	O
27	O
October	O
2011	O
,	O
version	O
4.0.2	O
was	O
released	O
supporting	O
some	O
new	O
features	O
of	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
.	O
</s>
<s>
After	O
the	O
release	O
of	O
the	O
.NET	B-Application
Framework	I-Application
4	O
,	O
Microsoft	O
released	O
a	O
set	O
of	O
enhancements	O
,	O
named	O
Windows	B-Application
Server	I-Application
AppFabric	I-Application
,	O
for	O
application	B-Application
server	I-Application
capabilities	O
in	O
the	O
form	O
of	O
AppFabric	B-Application
Hosting	O
and	O
in-memory	O
distributed	B-Architecture
caching	O
support	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.5	O
was	O
released	O
on	O
15	O
August	O
2012	O
;	O
a	O
set	O
of	O
new	O
or	O
improved	O
features	O
were	O
added	O
into	O
this	O
version	O
.	O
</s>
<s>
NET	B-Application
Framework	I-Application
4.5	O
is	O
supported	O
on	O
Windows	B-Application
Vista	I-Application
or	O
later	O
.	O
</s>
<s>
The	O
.NET	B-Application
Framework	I-Application
4.5	O
uses	O
Common	O
Language	O
Runtime	O
4.0	O
,	O
with	O
some	O
additional	O
runtime	O
features	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.5	O
is	O
supported	O
on	O
Windows	B-Application
Vista	I-Application
(	O
with	O
Service	O
Pack	O
2	O
)	O
,	O
Server	B-Device
2008	I-Device
(	O
with	O
Service	O
Pack	O
2	O
)	O
,	O
7	B-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
Server	B-Device
2008	I-Device
R2	I-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
8	B-Application
,	O
Server	B-Device
2012	I-Device
,	O
8.1	B-Device
and	O
Server	B-Device
2012	I-Device
R2	O
.	O
</s>
<s>
Applications	O
utilizing	O
.NET	B-Application
Framework	I-Application
4.5	O
will	O
also	O
run	O
on	O
computers	O
with	O
.NET	B-Application
Framework	I-Application
4.6	O
installed	O
,	O
which	O
supports	O
additional	O
operating	O
systems	O
.	O
</s>
<s>
Two	O
subset	O
of	O
the	O
.NET	B-Application
Framework	I-Application
is	O
available	O
for	O
building	O
Metro-style	O
apps	O
using	O
C#	B-Application
or	O
Visual	B-Language
Basic	I-Language
:	O
One	O
for	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Device
8.1	I-Device
,	O
called	O
.NET	B-Application
APIs	B-Application
for	O
Windows	O
8.x	O
Store	O
apps	O
.	O
</s>
<s>
Another	O
for	O
Universal	B-Device
Windows	I-Device
Platform	I-Device
(	O
UWP	O
)	O
,	O
called	O
.NET	B-Application
APIs	B-Application
for	O
UWP	O
.	O
</s>
<s>
This	O
version	O
of	O
.NET	B-Application
Framework	I-Application
,	O
as	O
well	O
as	O
the	O
runtime	O
and	O
libraries	O
used	O
for	O
Metro-style	O
apps	O
,	O
is	O
a	O
part	O
of	O
Windows	O
Runtime	O
,	O
the	O
new	O
platform	O
and	O
development	O
model	O
for	O
Metro-style	O
apps	O
.	O
</s>
<s>
It	O
is	O
an	O
ecosystem	O
that	O
houses	O
many	O
platforms	O
and	O
languages	O
,	O
including	O
.NET	B-Application
Framework	I-Application
,	O
C++	B-Language
and	O
HTML5	B-Application
with	O
JavaScript	B-Language
.	O
</s>
<s>
Ability	O
to	O
limit	O
how	O
long	O
the	O
regular	B-Language
expression	I-Language
engine	O
will	O
attempt	O
to	O
resolve	O
a	O
regular	B-Language
expression	I-Language
before	O
it	O
times	O
out	O
.	O
</s>
<s>
Ability	O
to	O
define	O
the	O
culture	O
for	O
an	O
application	B-Architecture
domain	I-Architecture
.	O
</s>
<s>
Native	O
support	O
for	O
Zip	B-General_Concept
compression	O
(	O
previous	O
versions	O
supported	O
the	B-Algorithm
compression	I-Algorithm
algorithm	I-Algorithm
,	O
but	O
not	O
the	O
archive	O
format	O
)	O
.	O
</s>
<s>
Ability	O
to	O
customize	O
a	O
reflection	B-Language
context	O
to	O
override	O
default	O
reflection	B-Language
behavior	O
through	O
the	O
CustomReflectionContext	O
class	O
.	O
</s>
<s>
New	O
asynchronous	O
features	O
were	O
added	O
to	O
the	O
C#	B-Application
and	O
Visual	B-Language
Basic	I-Language
languages	O
.	O
</s>
<s>
These	O
features	O
add	O
a	O
task-based	O
model	O
for	O
performing	O
asynchronous	O
operations	O
,	O
implementing	O
futures	B-Operating_System
and	I-Operating_System
promises	I-Operating_System
.	O
</s>
<s>
Support	O
for	O
new	O
HTML5	B-Application
form	O
types	O
.	O
</s>
<s>
Support	O
for	O
model	O
binders	O
in	O
Web	B-Application
Forms	I-Application
.	O
</s>
<s>
These	O
let	O
you	O
bind	O
data	O
controls	O
directly	O
to	O
data-access	O
methods	O
,	O
and	O
automatically	O
convert	O
user	O
input	O
to	O
and	O
from	O
.NET	B-Application
Framework	I-Application
data	O
types	O
.	O
</s>
<s>
Support	O
for	O
unobtrusive	O
JavaScript	B-Language
in	O
client-side	O
validation	O
scripts	O
.	O
</s>
<s>
Improved	O
handling	O
of	O
client	O
script	O
through	O
bundling	B-Application
and	O
minification	B-Language
for	O
improved	O
page	O
performance	O
.	O
</s>
<s>
Support	O
for	O
WebSocket	B-Protocol
protocol	O
.	O
</s>
<s>
Support	O
for	O
reading	O
and	O
writing	O
HTTP	B-Protocol
requests	I-Protocol
and	O
responses	O
asynchronously	B-General_Concept
.	O
</s>
<s>
Support	O
for	O
content	B-Operating_System
distribution	I-Operating_System
network	I-Operating_System
(	O
CDN	O
)	O
fallback	O
in	O
the	O
ScriptManager	O
control	O
.	O
</s>
<s>
The	O
release	O
of	O
.NET	B-Application
Framework	I-Application
4.5.1	O
was	O
announced	O
on	O
17	O
October	O
2013	O
along	O
Visual	B-Application
Studio	I-Application
2013	O
.	O
</s>
<s>
This	O
version	O
requires	O
Windows	B-Application
Vista	I-Application
SP2	O
and	O
later	O
and	O
is	O
included	O
with	O
Windows	B-Device
8.1	I-Device
and	O
Windows	B-Device
Server	I-Device
2012	I-Device
R2	O
.	O
</s>
<s>
New	O
features	O
of	O
.NET	B-Application
Framework	I-Application
4.5.1	O
:	O
</s>
<s>
The	O
release	O
of	O
.NET	B-Application
Framework	I-Application
4.5.2	O
was	O
announced	O
on	O
5	O
May	O
2014	O
.	O
</s>
<s>
This	O
version	O
requires	O
Windows	B-Application
Vista	I-Application
SP2	O
and	O
later	O
.	O
</s>
<s>
For	O
Windows	B-Application
Forms	I-Application
applications	O
,	O
improvements	O
were	O
made	O
for	O
high	B-Algorithm
DPI	I-Algorithm
scenarios	O
.	O
</s>
<s>
For	O
ASP.NET	B-Application
,	O
higher	O
reliability	O
HTTP	B-Protocol
header	O
inspection	O
and	O
modification	O
methods	O
are	O
available	O
as	O
is	O
a	O
new	O
way	O
to	O
schedule	O
background	O
asynchronous	O
worker	O
tasks	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.6	O
was	O
announced	O
on	O
12	O
November	O
2014	O
.	O
</s>
<s>
It	O
supports	O
a	O
new	O
just-in-time	O
compiler	O
(	O
JIT	O
)	O
for	O
64-bit	B-Device
systems	O
called	O
RyuJIT	O
,	O
which	O
features	O
higher	O
performance	O
and	O
support	O
for	O
SSE2	B-General_Concept
and	O
AVX2	O
instruction	O
sets	O
.	O
</s>
<s>
WPF	O
and	O
Windows	B-Application
Forms	I-Application
both	O
have	O
received	O
updates	O
for	O
high	B-Algorithm
DPI	I-Algorithm
scenarios	O
.	O
</s>
<s>
Support	O
for	O
TLS	B-Protocol
1.1	O
and	O
TLS	B-Protocol
1.2	O
has	O
been	O
added	O
to	O
WCF	O
.	O
</s>
<s>
This	O
version	O
requires	O
Windows	B-Application
Vista	I-Application
SP2	O
or	O
later	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
Vista	I-Application
SP2	O
and	O
Windows	B-Device
Server	I-Device
2008	I-Device
SP2	O
.	O
</s>
<s>
The	O
cryptographic	O
API	B-Application
in	O
.NET	B-Application
Framework	I-Application
4.6	O
uses	O
the	O
latest	O
version	O
of	O
Windows	O
CNG	O
cryptography	O
API	B-Application
.	O
</s>
<s>
As	O
a	O
result	O
,	O
NSA	O
Suite	O
B	O
Cryptography	O
is	O
available	O
to	O
.NET	B-Application
Framework	I-Application
.	O
</s>
<s>
Suite	O
B	O
consists	O
of	O
AES	B-Algorithm
,	O
the	O
SHA-2	B-Algorithm
family	O
of	O
hashing	O
algorithms	O
,	O
elliptic	B-Protocol
curve	I-Protocol
Diffie	I-Protocol
–	I-Protocol
Hellman	I-Protocol
,	O
and	O
elliptic	O
curve	O
DSA	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.6	O
is	O
supported	O
on	O
Windows	B-Application
Vista	I-Application
(	O
with	O
Service	O
Pack	O
2	O
)	O
,	O
Server	B-Device
2008	I-Device
(	O
with	O
Service	O
Pack	O
2	O
)	O
,	O
7	B-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
Server	B-Device
2008	I-Device
R2	I-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
8	B-Application
,	O
Server	B-Device
2012	I-Device
,	O
8.1	B-Device
,	O
Server	B-Device
2012	I-Device
R2	O
,	O
10	B-Operating_System
and	O
Server	B-Device
2016	I-Device
.	O
</s>
<s>
Support	O
for	O
.NET	B-Application
Framework	I-Application
4.6	O
ended	O
on	O
26	O
April	O
2022	O
.	O
</s>
<s>
The	O
release	O
of	O
.NET	B-Application
Framework	I-Application
4.6.1	O
was	O
announced	O
on	O
30	O
November	O
2015	O
.	O
</s>
<s>
This	O
version	O
requires	O
Windows	B-Device
7	I-Device
SP1	O
or	O
later	O
.	O
</s>
<s>
New	O
features	O
and	O
APIs	B-Application
include	O
:	O
</s>
<s>
Azure	O
SQL	O
Database	O
now	O
supports	O
distributed	B-Architecture
transactions	O
using	O
the	O
updated	O
System.Transactions	O
APIs	B-Application
.	O
</s>
<s>
The	O
preview	O
of	O
.NET	B-Application
Framework	I-Application
4.6.2	O
was	O
announced	O
on	O
30	O
March	O
2016	O
.	O
</s>
<s>
This	O
version	O
requires	O
Windows	B-Device
7	I-Device
SP1	O
or	O
later	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Operating_System
10	I-Operating_System
(	O
RTM-1511	O
)	O
although	O
there	O
have	O
been	O
some	O
unofficial	O
workarounds	O
to	O
use	O
a	O
subset	O
of	O
the	O
functionality	O
from	O
Version	O
4.7	O
in	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.6.2	O
is	O
also	O
shipped	O
as	O
Windows	O
container	B-Application
image	O
.	O
</s>
<s>
On	O
5	O
April	O
2017	O
,	O
Microsoft	O
announced	O
that	O
.NET	B-Application
Framework	I-Application
4.7	O
was	O
integrated	O
into	O
Windows	B-Operating_System
10	I-Operating_System
Creators	O
Update	O
,	O
promising	O
a	O
standalone	O
installer	O
for	O
other	O
Windows	O
versions	O
.	O
</s>
<s>
An	O
update	O
for	O
Visual	B-Application
Studio	I-Application
2017	O
was	O
released	O
on	O
this	O
date	O
to	O
add	O
support	O
for	O
targeting	O
.NET	B-Application
Framework	I-Application
4.7	O
.	O
</s>
<s>
The	O
promised	O
standalone	O
installer	O
for	O
Windows	B-Device
7	I-Device
and	O
later	O
was	O
released	O
on	O
2	O
May	O
2017	O
,	O
but	O
it	O
had	O
prerequisites	O
not	O
included	O
with	O
the	O
package	O
.	O
</s>
<s>
NET	B-Application
Framework	I-Application
4.7	O
dropped	O
support	O
for	O
Windows	B-Application
8	I-Application
and	O
will	O
only	O
run	O
on	O
Windows	B-Device
7	I-Device
Service	O
Pack	O
1	O
and	O
later	O
.	O
</s>
<s>
New	O
features	O
in	O
.NET	B-Application
Framework	I-Application
4.7	O
include	O
:	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.7	O
is	O
supported	O
on	O
Windows	B-Device
7	I-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
Server	B-Device
2008	I-Device
R2	I-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
Server	B-Device
2012	I-Device
,	O
8.1	B-Device
,	O
Server	B-Device
2012	I-Device
R2	O
,	O
10	B-Operating_System
,	O
Server	B-Device
2016	I-Device
and	O
Server	B-Device
2019	I-Device
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.7	O
is	O
also	O
shipped	O
as	O
a	O
Windows	O
container	B-Application
image	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.7.1	O
was	O
released	O
on	O
17	O
October	O
2017	O
.	O
</s>
<s>
It	O
also	O
adds	O
compatibility	O
with	O
the	O
.NET	B-Application
Standard	O
2.0	O
out	O
of	O
the	O
box	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.7.1	O
is	O
also	O
shipped	O
as	O
a	O
Windows	O
container	B-Application
image	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.7.2	O
was	O
released	O
on	O
30	O
April	O
2018	O
.	O
</s>
<s>
Amongst	O
the	O
changes	O
are	O
improvements	O
to	O
ASP.NET	B-Application
,	O
BCL	O
,	O
CLR	O
,	O
ClickOnce	B-Application
,	O
Networking	O
,	O
SQL	O
,	O
WCF	O
,	O
Windows	B-Application
Forms	I-Application
,	O
Workflow	B-Operating_System
and	O
WPF	O
.	O
</s>
<s>
This	O
version	O
is	O
included	O
with	O
Server	B-Device
2019	I-Device
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.7.2	O
is	O
also	O
shipped	O
as	O
a	O
Windows	O
container	B-Application
image	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.8	O
was	O
released	O
on	O
18	O
April	O
2019	O
.	O
</s>
<s>
It	O
was	O
the	O
final	O
version	O
of	O
.NET	B-Application
Framework	I-Application
,	O
all	O
future	O
work	O
going	O
into	O
the	O
.NET	B-Application
Core	I-Application
platform	O
that	O
will	O
eventually	O
become	O
.NET	B-Application
5	I-Application
and	O
onwards	O
.	O
</s>
<s>
This	O
release	O
included	O
JIT	O
enhancements	O
ported	O
from	O
.NET	B-Application
Core	I-Application
2.1	I-Application
,	O
High	B-Algorithm
DPI	I-Algorithm
enhancements	O
for	O
WPF	O
applications	O
,	O
accessibility	O
improvements	O
,	O
performance	O
updates	O
,	O
and	O
security	O
enhancements	O
.	O
</s>
<s>
It	O
supported	O
Windows	B-Device
7	I-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
Server	B-Device
2008	I-Device
R2	I-Device
(	O
with	O
Service	O
Pack	O
1	O
)	O
,	O
Server	B-Device
2012	I-Device
,	O
8.1	B-Device
,	O
Server	B-Device
2012	I-Device
R2	O
,	O
10	B-Operating_System
,	O
Server	B-Device
2016	I-Device
and	O
Server	B-Device
2019	I-Device
and	O
also	O
shipped	O
as	O
a	O
Windows	O
container	B-Application
image	O
.	O
</s>
<s>
It	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Device
7	I-Device
SP1	O
,	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	I-Device
SP1	O
,	O
Windows	B-Device
Server	I-Device
2012	I-Device
,	O
Windows	B-Device
8.1	I-Device
,	O
Windows	B-Device
Server	I-Device
2012	I-Device
R2	O
,	O
Windows	B-Operating_System
10	I-Operating_System
(	O
1607	O
–	O
2004	O
)	O
,	O
Windows	B-Device
Server	I-Device
2016	I-Device
and	O
Windows	B-Device
Server	I-Device
2019	I-Device
.	O
</s>
<s>
The	O
most-recent	O
release	O
is	O
4.8.0	O
Build	O
4115	O
,	O
with	O
an	O
offline	O
installer	O
size	O
of	O
115	O
MB	O
(	O
121,307,088	O
bytes	O
)	O
and	O
a	O
digital	O
signature	O
date	O
of	O
May	O
1	O
,	O
2021	O
.	O
</s>
<s>
.NET	B-Application
Framework	I-Application
4.8.1	O
was	O
released	O
on	O
9	O
August	O
2022	O
.	O
</s>
<s>
This	O
version	O
includes	O
the	O
native	O
ARM64	B-Architecture
support	O
,	O
WCAG2.1	O
compliant	O
accessible	O
tooltips	O
,	O
and	O
accessibility	O
improvements	O
for	O
Windows	B-Application
Forms	I-Application
.	O
</s>
<s>
It	O
is	O
supported	O
on	O
Windows	B-Operating_System
10	I-Operating_System
(	O
20H2+	O
)	O
,	O
Windows	B-Device
Server	I-Device
2022	I-Device
and	O
Windows	B-Application
11	I-Application
.	O
</s>
