<s>
The	O
Microsoft	B-Application
Enterprise	I-Application
Library	I-Application
is	O
a	O
set	O
of	O
tools	O
and	O
programming	B-Library
libraries	I-Library
for	O
the	O
Microsoft	B-Application
.NET	I-Application
Framework	I-Application
.	O
</s>
<s>
It	O
provides	O
APIs	O
to	O
facilitate	O
proven	O
practices	O
in	O
core	O
areas	O
of	O
programming	O
including	O
data	O
access	O
,	O
logging	O
,	O
exception	B-General_Concept
handling	I-General_Concept
and	O
others	O
.	O
</s>
<s>
Enterprise	B-Application
Library	I-Application
is	O
provided	O
as	O
pluggable	O
binaries	O
and	O
source	O
code	O
,	O
which	O
can	O
be	O
freely	O
used	O
and	O
customized	O
by	O
developers	O
for	O
their	O
own	O
purposes	O
.	O
</s>
<s>
For	O
instance	O
,	O
if	O
an	O
application	O
does	O
not	O
properly	O
handle	O
an	O
exception	O
,	O
instead	O
of	O
adding	O
another	O
exception	B-General_Concept
handler	I-General_Concept
to	O
the	O
code	O
,	O
an	O
administrator	O
can	O
configure	O
an	O
additional	O
exception	B-General_Concept
handling	I-General_Concept
policy	O
.	O
</s>
<s>
Each	O
application	O
block	O
addresses	O
a	O
specific	O
cross-cutting	B-Application
concern	I-Application
and	O
provides	O
highly	O
configurable	O
features	O
,	O
which	O
results	O
in	O
higher	O
developer	O
productivity	O
.	O
</s>
<s>
The	O
Application	O
Blocks	O
in	O
Enterprise	B-Application
Library	I-Application
are	O
designed	O
to	O
be	O
as	O
agnostic	O
as	O
possible	O
to	O
the	O
application	O
architecture	O
,	O
for	O
example	O
the	O
Logging	O
Application	O
Block	O
may	O
be	O
used	O
equally	O
in	O
a	O
web	O
,	O
smart	B-Protocol
client	I-Protocol
or	O
service-oriented	O
application	O
.	O
</s>
<s>
Microsoft	O
have	O
produced	O
a	O
number	O
of	O
other	O
deliverables	O
that	O
leverage	O
Enterprise	B-Application
Library	I-Application
Application	O
Blocks	O
,	O
including	O
the	O
Web	O
Service	O
Software	B-Application
Factory	I-Application
and	O
Smart	B-Protocol
Client	I-Protocol
Software	B-Application
Factory	I-Application
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
Application	O
Blocks	O
,	O
the	O
standard	O
Microsoft	O
distribution	O
of	O
the	O
Enterprise	B-Application
Library	I-Application
includes	O
:	O
</s>
<s>
There	O
have	O
been	O
several	O
versions	O
of	O
the	O
Microsoft	B-Application
Enterprise	I-Application
Library	I-Application
:	O
</s>
<s>
Unity	O
is	O
the	O
dependency	B-Library
injection	I-Library
component	O
of	O
Microsoft	B-Application
Enterprise	I-Application
Library	I-Application
,	O
which	O
grew	O
out	O
of	O
the	O
Dependency	B-Library
Injection	I-Library
Application	O
Block	O
.	O
</s>
<s>
Version	O
3.5	O
,	O
released	O
in	O
April	O
2014	O
,	O
adds	O
support	O
for	O
Xamarin	B-Application
.	O
</s>
<s>
Microsoft	B-Application
Enterprise	I-Application
Library	I-Application
6	O
was	O
released	O
in	O
April	O
2013	O
.	O
</s>
<s>
Microsoft	B-Application
Enterprise	I-Application
Library	I-Application
5.0	O
was	O
released	O
in	O
April	O
2010	O
,	O
announced	O
by	O
Grigori	O
Melnik	O
.	O
</s>
<s>
A	O
port	O
of	O
Microsoft	B-Application
Enterprise	I-Application
Library	I-Application
5.0	O
to	O
Silverlight	B-Application
.	O
</s>
<s>
This	O
release	O
of	O
Enterprise	B-Application
Library	I-Application
in	O
October	O
2008	O
is	O
a	O
service	O
releases	O
that	O
includes	O
the	O
following	O
:	O
</s>
<s>
The	O
Application	O
Block	O
Software	B-Application
Factory	I-Application
and	O
the	O
Strong	O
Naming	O
Guidance	O
Package	O
are	O
not	O
included	O
in	O
this	O
release	O
but	O
are	O
available	O
as	O
a	O
separate	O
download	O
.	O
</s>
<s>
This	O
release	O
of	O
Enterprise	B-Application
Library	I-Application
in	O
May	O
2008	O
includes	O
the	O
following	O
:	O
</s>
<s>
In	O
May	O
2007	O
,	O
Enterprise	B-Application
Library	I-Application
3.1	O
was	O
released	O
with	O
minor	O
enhancements	O
to	O
the	O
Validation	O
and	O
Policy	O
Injection	O
Application	O
Blocks	O
.	O
</s>
<s>
In	O
April	O
2007	O
,	O
Enterprise	B-Application
Library	I-Application
3.0	O
was	O
released	O
.	O
</s>
<s>
It	O
contains	O
new	O
Application	O
Blocks	O
,	O
a	O
new	O
Application	O
Block	O
Software	B-Application
factory	I-Application
designed	O
to	O
simplify	O
the	O
development	O
of	O
new	O
Application	O
Blocks	O
and	O
extensions	O
,	O
and	O
new	O
features	O
providing	O
better	O
integration	O
with	O
.NET	B-Application
Framework	I-Application
3.0	O
.	O
</s>
<s>
The	O
3.0	O
release	O
of	O
Enterprise	B-Application
Library	I-Application
contains	O
the	O
following	O
Application	O
Blocks	O
:	O
</s>
<s>
In	O
January	O
2006	O
,	O
a	O
new	O
version	O
of	O
Enterprise	B-Application
Library	I-Application
was	O
released	O
that	O
targeted	O
.NET	B-Application
Framework	I-Application
2.0	O
.	O
</s>
<s>
The	O
most	O
significant	O
change	O
in	O
this	O
release	O
was	O
that	O
the	O
Configuration	O
Application	O
Block	O
was	O
removed	O
,	O
and	O
the	O
blocks	O
were	O
updated	O
to	O
use	O
.NET	B-Application
'	O
s	O
improved	O
System.Configuration	O
capabilities	O
.	O
</s>
<s>
This	O
release	O
also	O
included	O
significant	O
improvements	O
to	O
the	O
Logging	O
Application	O
Block	O
,	O
and	O
much	O
of	O
the	O
Security	O
Application	O
Block	O
was	O
removed	O
due	O
to	O
similar	O
capabilities	O
provided	O
in	O
.NET	B-Application
Framework	I-Application
2.0	O
.	O
</s>
<s>
The	O
.NET	B-Application
2.0	O
release	O
of	O
Enterprise	B-Application
Library	I-Application
contained	O
the	O
following	O
Application	O
Blocks	O
:	O
</s>
<s>
Two	O
releases	O
of	O
Enterprise	B-Application
Library	I-Application
were	O
released	O
for	O
.NET	B-Application
Framework	I-Application
1.1	O
.	O
</s>
<s>
The	O
.NET	B-Application
1.1	O
releases	O
of	O
Enterprise	B-Application
Library	I-Application
contained	O
the	O
following	O
Application	O
Blocks	O
:	O
</s>
<s>
Ron	O
Jacobs	O
,	O
a	O
Microsoft	O
Evangelist	O
,	O
described	O
the	O
purpose	O
of	O
Enterprise	B-Application
Library	I-Application
as	O
"	O
filling	O
in	O
the	O
gaps	O
"	O
of	O
.NET	B-Application
development	O
between	O
releases	O
of	O
the	O
framework	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
Microsoft	O
platforms	O
evolve	O
and	O
certain	O
scenarios	O
,	O
initially	O
addressed	O
by	O
the	O
Enterprise	B-Application
Library	I-Application
,	O
are	O
now	O
being	O
supported	O
by	O
the	O
platforms	O
themselves	O
.	O
</s>
<s>
Microsoft	O
continues	O
to	O
promote	O
Enterprise	B-Application
Library	I-Application
for	O
enterprise/line	O
-of-business	O
development	O
,	O
and	O
even	O
many	O
Microsoft	O
products	O
as	O
well	O
as	O
projects	O
within	O
Microsoft	O
IT	O
use	O
it	O
extensively	O
.	O
</s>
<s>
Starting	O
November	O
2013	O
,	O
Microsoft	O
fully	O
open-sourced	B-Application
Enterprise	B-Application
Library	I-Application
and	O
all	O
of	O
its	O
application	O
blocks	O
.	O
</s>
<s>
In	O
August	O
2015	O
,	O
Microsoft	O
posted	O
they	O
were	O
handing	O
Unity	O
Dependency	B-Library
Injection	I-Library
over	O
to	O
new	O
owners	O
(	O
Pablo	O
Cibraro	O
and	O
Pedro	O
Wood	O
)	O
into	O
a	O
new	O
GitHub	O
repo	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
the	O
patterns	O
&	O
practices	O
-	O
Enterprise	B-Application
Library	I-Application
home	O
web	O
site	O
on	O
CodePlex	O
,	O
announced	O
that	O
the	O
remainder	O
of	O
the	O
application	O
blocks	O
will	O
no	O
longer	O
be	O
developed	O
.	O
</s>
