<s>
Microsoft	B-Application
Silverlight	I-Application
is	O
an	O
application	B-Application
framework	I-Application
for	O
writing	O
and	O
running	O
rich	B-Application
web	I-Application
applications	I-Application
that	O
was	O
actively	O
developed	O
and	O
marketed	O
by	O
Microsoft	O
from	O
2007	O
to	O
2012	O
.	O
</s>
<s>
Silverlight	B-Application
1	O
,	O
which	O
was	O
developed	O
under	O
the	O
codename	O
Windows	B-Application
Presentation	I-Application
Foundation/Everywhere	I-Application
(	O
WPF/E	B-Application
)	O
and	O
released	O
in	O
2007	O
,	O
consists	O
of	O
the	O
core	O
presentation	O
framework	O
,	O
which	O
is	O
responsible	O
for	O
the	O
UI	O
(	O
user	B-Application
interface	I-Application
)	O
,	O
interactivity	O
and	O
user	O
input	O
,	O
basic	O
UI	O
controls	O
,	O
graphics	O
and	O
animation	O
,	O
media	O
playback	O
,	O
digital	O
rights	O
management	O
(	O
DRM	O
)	O
,	O
and	O
DOM	B-General_Concept
integration	O
.	O
</s>
<s>
A	O
Silverlight	B-Application
application	O
starts	O
by	O
invoking	O
the	O
Silverlight	B-Application
control	O
from	O
the	O
HTML	B-Language
page	O
,	O
which	O
then	O
loads	O
a	O
XAML	O
file	O
.	O
</s>
<s>
The	O
XAML	O
file	O
contains	O
a	O
Canvas	O
object	O
,	O
which	O
acts	O
as	O
a	O
container	B-Application
for	O
other	O
elements	O
.	O
</s>
<s>
Silverlight	B-Application
provides	O
various	O
geometrical	O
primitives	O
like	O
lines	O
,	O
ellipses	O
and	O
other	O
shapes	O
,	O
to	O
elements	O
like	O
text	O
,	O
images	O
,	O
and	O
media	O
,	O
etc	O
.	O
</s>
<s>
Programmatic	O
manipulation	O
of	O
the	O
UI	O
is	O
achieved	O
by	O
using	O
scripting	O
languages	O
to	O
modify	O
the	O
Document	B-General_Concept
Object	I-General_Concept
Model	I-General_Concept
of	O
the	O
Silverlight	B-Application
Canvas	O
object	O
.	O
</s>
<s>
To	O
facilitate	O
this	O
,	O
Silverlight	B-Application
exposes	O
a	O
DOM	B-General_Concept
API	I-General_Concept
,	O
accessible	O
from	O
any	O
scripting	O
language	O
supported	O
by	O
Silverlight	B-Application
,	O
which	O
in	O
version	O
1	O
release	O
is	O
limited	O
to	O
JavaScript	B-Language
running	O
in	O
the	O
browser	O
.	O
</s>
<s>
The	O
native	O
widgets	O
of	O
the	O
browser	O
must	O
be	O
overlaid	O
on	O
top	O
of	O
the	O
Silverlight	B-Application
Canvas	O
for	O
user	O
input	O
.	O
</s>
<s>
Support	O
for	O
data	O
formats	O
is	O
limited	O
to	O
XML	O
and	O
JSON	B-General_Concept
only	O
.	O
</s>
<s>
Silverlight	B-Application
2	O
(	O
previously	O
referred	O
to	O
as	O
version	O
1.1	O
)	O
includes	O
a	O
version	O
of	O
the	O
.NET	B-Application
Framework	I-Application
,	O
implementing	O
the	O
same	O
full	O
Common	O
Language	O
Runtime	O
(	O
CLR	O
)	O
version	O
as	O
.NET	B-Application
Framework	I-Application
3.0	O
;	O
so	O
it	O
can	O
execute	O
programs	O
written	O
in	O
any	O
.NET	B-Application
language	O
.	O
</s>
<s>
(	O
By	O
default	O
,	O
however	O
,	O
reference	O
assemblies	O
compiled	O
with	O
the	O
regular	O
.NET	B-Application
Framework	I-Application
cannot	O
be	O
referenced	O
.	O
)	O
</s>
<s>
Unlike	O
the	O
CLR	O
included	O
with	O
.NET	B-Application
Framework	I-Application
version	O
3.5	O
and	O
earlier	O
,	O
but	O
like	O
.NET	B-Application
Framework	I-Application
4.0	O
,	O
the	O
CoreCLR	O
instance	O
included	O
in	O
Silverlight	B-Application
can	O
be	O
hosted	O
with	O
another	O
instance	O
of	O
one	O
of	O
the	O
desktop	O
CLRs	O
in	O
one	O
single	O
process	O
.	O
</s>
<s>
With	O
this	O
,	O
the	O
XAML	O
layout	O
markup	O
file	O
(	O
.xaml	O
file	O
)	O
can	O
be	O
augmented	O
by	O
code-behind	O
code	O
,	O
written	O
in	O
any	O
.NET	B-Application
language	O
,	O
which	O
contains	O
the	O
programming	O
logic	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
to	O
programmatically	O
manipulate	O
both	O
the	O
Silverlight	B-Application
application	O
and	O
the	O
HTML	B-Language
page	O
which	O
hosts	O
the	O
Silverlight	B-Application
control	O
.	O
</s>
<s>
The	O
XAML	O
markup	O
,	O
as	O
well	O
as	O
the	O
code	O
,	O
is	O
compiled	O
into	O
CLI	O
assemblies	O
which	O
are	O
then	O
compressed	O
using	O
ZIP	B-General_Concept
and	O
stored	O
in	O
a	O
.xap	O
file	O
.	O
</s>
<s>
Silverlight	B-Application
ships	O
with	O
a	O
lightweight	O
class	O
library	O
which	O
includes	O
features	O
such	O
as	O
extensible	O
controls	O
,	O
web	O
services	O
,	O
networking	B-Architecture
components	O
and	O
Language	B-Language
Integrated	I-Language
Query	I-Language
(	O
LINQ	B-Language
)	O
APIs	B-Application
.	O
</s>
<s>
This	O
class	O
library	O
is	O
a	O
subset	O
of	O
,	O
and	O
is	O
considerably	O
smaller	O
than	O
,	O
.NET	B-Application
Framework	I-Application
's	O
Base	O
Class	O
Library	O
(	O
BCL	O
)	O
.	O
</s>
<s>
Silverlight	B-Application
code	O
runs	O
in	O
a	O
sandbox	O
,	O
thus	O
preventing	O
the	O
invocation	O
of	O
platform	O
APIs	B-Application
.	O
</s>
<s>
The	O
version	O
of	O
.NET	B-Application
Framework	I-Application
in	O
Silverlight	B-Application
adds	O
a	O
subset	O
of	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
(	O
WPF	O
)	O
UI-programming	O
model	O
,	O
including	O
support	O
for	O
shapes	O
,	O
documents	O
,	O
media	O
and	O
animation	O
objects	O
of	O
WPF	O
.	O
</s>
<s>
The	O
included	O
BCL	O
provides	O
classes	O
for	O
collections	B-Application
,	O
reflection	B-Language
,	O
regular	B-Language
expressions	I-Language
,	O
string	O
handling	O
and	O
data	B-General_Concept
access	I-General_Concept
.	O
</s>
<s>
It	O
also	O
supports	O
LINQ	B-Language
,	O
with	O
full	O
support	O
for	O
LINQ	B-Language
to	O
Objects	O
and	O
expression	O
trees	O
.	O
</s>
<s>
Almost	O
all	O
of	O
the	O
System.Linq	O
and	O
System.Linq.Expression	O
namespaces	O
are	O
exposed	O
.	O
</s>
<s>
It	O
also	O
supports	O
serialization	B-Application
of	O
objects	O
,	O
for	O
data	B-Application
persistence	I-Application
.	O
</s>
<s>
Silverlight	B-Application
can	O
handle	O
data	O
in	O
RSS	O
or	O
JSON	B-General_Concept
format	O
,	O
in	O
addition	O
to	O
XML	O
.	O
</s>
<s>
Silverlight	B-Application
2	O
also	O
supports	O
asynchronous	O
programming	O
via	O
the	O
use	O
of	O
the	O
threading	O
libraries	O
.	O
</s>
<s>
Silverlight	B-Application
also	O
includes	O
classes	O
for	O
data	B-General_Concept
access	I-General_Concept
over	O
web	O
services	O
,	O
REST	B-Protocol
,	O
Windows	B-Application
Communication	I-Application
Foundation	I-Application
(	O
WCF	O
)	O
Services	O
and	O
ADO.NET	B-Device
Data	I-Device
Services	I-Device
.	O
</s>
<s>
The	O
networking	B-Architecture
support	O
in	O
Silverlight	B-Application
can	O
be	O
used	O
by	O
Silverlight	B-Application
applications	O
to	O
communicate	O
using	O
HTTP	B-Protocol
,	O
or	O
at	O
the	O
lower	O
socket	B-Protocol
level	O
.	O
</s>
<s>
Silverlight	B-Application
uses	O
an	O
XML-based	O
configuration	O
file	O
to	O
control	O
the	O
cross-domain	O
resource-access	O
policy	O
,	O
for	O
both	O
HTTP	B-Protocol
and	O
socket	B-Protocol
connections	I-Protocol
.	O
</s>
<s>
It	O
can	O
be	O
used	O
by	O
site	O
administrators	O
to	O
control	O
which	O
resources	O
a	O
Silverlight	B-Application
application	O
can	O
access	O
,	O
when	O
that	O
application	O
did	O
not	O
originate	O
in	O
the	O
domain	O
of	O
the	O
site	O
.	O
</s>
<s>
In	O
addition	O
,	O
Silverlight	B-Application
also	O
supports	O
the	O
Adobe	B-Operating_System
Flash	I-Operating_System
Cross-domain	O
policy	O
file	O
format	O
.	O
</s>
<s>
Silverlight	B-Application
sockets	O
can	O
only	O
initiate	O
a	O
connection	O
;	O
they	O
cannot	O
listen	O
for	O
connections	O
.	O
</s>
<s>
Silverlight	B-Application
2	O
includes	O
the	O
Dynamic	B-Application
Language	I-Application
Runtime	I-Application
(	O
DLR	O
)	O
which	O
allows	O
dynamic	O
compilation	O
and	O
execution	O
of	O
dynamic	O
(	O
scripting	O
)	O
languages	O
.	O
</s>
<s>
The	O
Dynamic	O
Languages	O
software	B-Application
development	I-Application
kit	I-Application
includes	O
a	O
web	B-Application
server	I-Application
named	O
,	O
that	O
can	O
dynamically	O
package	O
all	O
the	O
dependencies	O
for	O
the	O
Dynamic	O
Languages	O
application	O
and	O
serve	O
it	O
to	O
the	O
browser	O
.	O
</s>
<s>
The	O
first	O
upcoming	O
languages	O
written	O
for	O
the	O
DLR	O
are	O
Managed	O
JScript	B-Language
,	O
IronPython	O
2.0	O
,	O
and	O
IronRuby	O
.	O
</s>
<s>
Microsoft	O
also	O
plans	O
to	O
build	O
Visual	O
Basic	O
.NET	B-Application
10.0	O
(	O
VBx	O
)	O
on	O
the	O
DLR	O
.	O
</s>
<s>
All	O
four	O
languages	O
share	O
the	O
same	O
infrastructure	O
,	O
to	O
allow	O
Silverlight	B-Application
to	O
compile	O
and	O
execute	O
the	O
language	O
source	O
.	O
</s>
<s>
Conversely	O
,	O
other	O
.NET	B-Application
languages	O
must	O
be	O
compiled	O
ahead-of-time	O
and	O
delivered	O
to	O
Silverlight	B-Application
as	O
.NET	B-Application
assemblies	O
.	O
</s>
<s>
The	O
implementation	O
of	O
Managed	O
JScript	B-Language
conforms	O
to	O
the	O
ECMAScript	B-Language
3.0	O
specification	O
,	O
and	O
Microsoft	O
asserts	O
that	O
it	O
is	O
250	O
times	O
faster	O
than	O
interpreted	O
JScript	B-Language
.	O
</s>
<s>
With	O
the	O
integration	O
of	O
.NET	B-Application
Framework	I-Application
,	O
Silverlight	B-Application
also	O
allows	O
HTML-managed	O
code	O
interaction	O
,	O
which	O
enables	O
the	O
manipulation	O
of	O
HTML	B-General_Concept
DOM	I-General_Concept
elements	O
from	O
managed	O
code	O
,	O
and	O
permits	O
JavaScript	B-Language
code	O
to	O
call	O
managed	O
code	O
and	O
use	O
objects	O
instantiated	O
by	O
managed	O
code	O
.	O
</s>
<s>
Silverlight	B-Application
encloses	O
JavaScript	B-Language
objects	O
and	O
DOM	B-General_Concept
elements	O
in	O
managed	O
wrappers	O
to	O
make	O
them	O
available	O
from	O
managed	O
code	O
.	O
</s>
<s>
While	O
there	O
is	O
no	O
provision	O
for	O
calling	O
JavaScript	B-Language
code	O
directly	O
in	O
the	O
1.1	O
alpha	O
release	O
,	O
managed-code	O
events	O
can	O
fire	O
JavaScript	B-Language
handlers	O
.	O
</s>
<s>
A	O
Silverlight	B-Application
instance	O
does	O
not	O
need	O
to	O
have	O
a	O
UI	O
component	O
in	O
order	O
to	O
manipulate	O
the	O
HTML	B-General_Concept
DOM	I-General_Concept
from	O
managed	O
code	O
.	O
</s>
<s>
It	O
is	O
done	O
by	O
creating	O
a	O
XAML	O
Canvas	O
with	O
both	O
width	O
and	O
height	O
set	O
to	O
zero	O
,	O
and	O
using	O
its	O
code-behind	O
code	O
to	O
modify	O
the	B-General_Concept
DOM	I-General_Concept
of	O
the	O
HTML	B-Language
page	O
via	O
the	O
APIs	B-Application
in	O
the	O
System.Browser	O
namespace	O
.	O
</s>
<s>
Silverlight	B-Application
2	O
includes	O
Deep	B-Operating_System
Zoom	I-Operating_System
,	O
a	O
technology	O
derived	O
from	O
Microsoft	O
Live	O
Labs	O
 '	O
Seadragon	B-Operating_System
.	O
</s>
<s>
The	O
images	O
can	O
scale	O
from	O
2	O
or	O
3	O
megapixels	O
in	O
resolution	O
into	O
the	O
gigapixel	O
range	O
,	O
but	O
the	O
user	O
need	O
not	O
wait	O
for	O
it	O
to	O
be	O
downloaded	O
entirely	O
;	O
rather	O
,	O
Silverlight	B-Application
downloads	O
only	O
the	O
parts	O
in	O
view	O
,	O
optimized	O
for	O
the	O
zoom	O
level	O
being	O
viewed	O
.	O
</s>
<s>
Beta	O
2	O
onwards	O
,	O
Deep	B-Operating_System
Zoom	I-Operating_System
uses	O
an	O
XML-based	O
file	O
format	O
.	O
</s>
<s>
Media	O
features	O
in	O
Silverlight	B-Application
2	O
include	O
:	O
</s>
<s>
Media	O
Stream	O
Source	O
API	B-Application
.	O
</s>
<s>
The	O
Media	O
Stream	O
Source	O
is	O
the	O
API	B-Application
responsible	O
for	O
enabling	O
adaptive	O
streaming	O
of	O
media	O
.	O
</s>
<s>
Adaptive	O
streaming	O
allows	O
the	O
player	O
application	O
to	O
choose	O
the	O
bit	O
rate	O
of	O
the	O
media	O
based	O
on	O
available	O
client	O
bandwidth	O
and	O
central	B-General_Concept
processing	I-General_Concept
unit	I-General_Concept
(	O
CPU	O
)	O
resources	O
.	O
</s>
<s>
Media	O
Stream	O
Source	O
allows	O
the	O
developer	O
to	O
specify	O
a	O
custom	O
method	O
of	O
retrieving	O
media	O
data	O
,	O
the	O
only	O
requirement	O
being	O
that	O
the	O
final	O
video	O
and	O
audio	O
streams	O
be	O
presented	O
to	O
Silverlight	B-Application
runtime	O
in	O
a	O
format	O
that	O
Silverlight	B-Application
can	O
decode	O
(	O
VC-1	O
,	O
H.264	O
,	O
WMA	O
,	O
MP3	O
,	O
etc	O
.	O
)	O
.	O
</s>
<s>
Shoutcast	B-Application
)	O
and	O
delivery	O
methods	O
(	O
i.e.	O
</s>
<s>
Silverlight	B-Application
2	O
also	O
allows	O
limited	O
filesystem	O
access	O
to	O
Silverlight	B-Application
applications	O
.	O
</s>
<s>
For	O
local	O
storage	O
of	O
data	O
,	O
Silverlight	B-Application
provides	O
isolated	O
local	O
storage	O
(	O
isostorage	O
)	O
,	O
namely	O
,	O
outside	O
the	O
browser	O
cache	O
,	O
in	O
a	O
folder	O
hidden	O
inside	O
the	O
private	O
user-profile	O
folder	O
.	O
</s>
<s>
Data	O
stored	O
by	O
a	O
Silverlight	B-Application
application	O
in	O
the	O
isostorage	O
is	O
identified	O
by	O
the	O
URL	O
from	O
which	O
it	O
loads	O
,	O
and	O
can	O
be	O
accessed	O
by	O
that	O
application	O
only	O
.	O
</s>
<s>
All	O
instances	O
of	O
Silverlight	B-Application
share	O
the	O
same	O
isostorage	O
,	O
so	O
all	O
instances	O
of	O
the	O
same	O
Silverlight	B-Application
application	O
can	O
share	O
the	O
saved	O
data	O
,	O
even	O
if	O
they	O
are	O
running	O
on	O
different	O
browsers	O
.	O
</s>
<s>
Silverlight	B-Application
CoreCLR	O
uses	O
an	O
attribute-based	O
security	O
model	O
,	O
as	O
opposed	O
to	O
the	O
Code	O
Access	O
Security	O
(	O
CAS	O
)	O
model	O
of	O
the	O
desktop	O
version	O
of	O
.NET	B-Application
Framework	I-Application
.	O
</s>
<s>
Methods	O
in	O
transparent	O
assemblies	O
run	O
with	O
partial	O
trust	O
,	O
and	O
codes	O
within	O
such	O
assemblies	O
cannot	O
call	O
critical	O
methods	O
(	O
methods	O
which	O
can	O
cause	O
system-wide	O
changes	O
)	O
;	O
neither	O
can	O
transparent	O
assemblies	O
contain	O
unverifiable	O
code	O
(	O
use	O
the	O
unsafe	O
C#	B-Application
keyword	O
or	O
use	O
pointers	O
)	O
or	O
invoke	O
system	O
functions	O
by	O
means	O
of	O
P/Invoke	O
.	O
</s>
<s>
In	O
fact	O
,	O
the	O
IsoStorage	O
APIs	B-Application
are	O
exposed	O
as	O
safecritical	O
methods	O
.	O
</s>
<s>
Silverlight	B-Application
assemblies	O
can	O
contain	O
members	O
that	O
are	O
not	O
usable	O
by	O
CoreCLR	O
,	O
as	O
long	O
as	O
they	O
can	O
be	O
processed	O
by	O
the	O
.NET	B-Application
Framework	I-Application
CLR	O
;	O
such	O
methods	O
will	O
not	O
be	O
loaded	O
when	O
the	O
assembly	O
is	O
being	O
executed	O
by	O
CoreCLR	O
.	O
</s>
<s>
The	O
Silverlight	B-Application
runtime	O
ensures	O
that	O
platform	O
assemblies	O
are	O
loaded	O
only	O
from	O
the	O
Silverlight	B-Application
installation	O
directory	O
,	O
and	O
are	O
digitally	O
signed	O
by	O
Microsoft	O
.	O
</s>
<s>
The	O
BCL	O
methods	O
of	O
the	O
.NET	B-Application
Framework	I-Application
,	O
which	O
have	O
the	O
Internet	O
attribute	O
set	O
,	O
allowing	O
them	O
to	O
be	O
called	O
from	O
untrusted	O
code	O
originating	O
from	O
the	O
Internet	O
,	O
are	O
exposed	O
in	O
Silverlight	B-Application
BCL	O
as	O
transparent	O
methods	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
was	O
announced	O
at	O
the	O
International	O
Broadcasting	O
Convention	O
(	O
IBC	O
)	O
2008	O
show	O
in	O
Amsterdam	O
on	O
September	O
12	O
,	O
2008	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
includes	O
an	O
increased	O
number	O
of	O
controls	O
—	O
including	O
DataGrid	O
,	O
TreeView	O
,	O
various	O
layout	O
panels	O
,	O
DataForm	O
for	O
forms-driven	O
applications	O
and	O
DataPager	O
for	O
viewing	O
paginated	O
data	O
.	O
</s>
<s>
Some	O
of	O
these	O
controls	O
are	O
from	O
the	O
Silverlight	B-Application
Toolkit	O
.	O
</s>
<s>
In	O
addition	O
,	O
Silverlight	B-Application
3	I-Application
includes	O
a	O
navigation	O
framework	O
to	O
let	O
Silverlight	B-Application
applications	O
use	O
the	O
hyperlinked	O
navigation	O
model	O
as	O
well	O
as	O
enabling	O
deep-linking	O
(	O
linking	O
directly	O
to	O
specific	O
pages	O
)	O
within	O
Silverlight	B-Application
applications	O
.	O
</s>
<s>
On	O
the	O
media	O
front	O
,	O
Silverlight	B-Application
3	I-Application
supports	O
Advanced	B-Application
Audio	I-Application
Coding	I-Application
(	O
AAC	O
)	O
audio	O
decoding	O
as	O
well	O
as	O
hardware-accelerated	O
H.264	O
video	O
decoding	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
also	O
offers	O
1080p	O
smooth	O
streaming	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
supports	O
perspective	O
3D	O
which	O
enables	O
3D	O
transformations	O
of	O
2D	O
elements	O
.	O
</s>
<s>
Custom	O
animations	O
,	O
including	O
transforms	O
and	O
blends	O
,	O
can	O
be	O
created	O
on	O
Silverlight	B-Application
elements	O
using	O
High	B-Language
Level	I-Language
Shader	I-Language
Language	I-Language
(	O
HLSL	B-Language
)	O
to	O
make	O
use	O
of	O
pixel	O
shaders	O
.	O
</s>
<s>
A	O
bitmap	O
API	B-Application
is	O
provided	O
to	O
let	O
Silverlight	B-Application
3	I-Application
applications	O
manipulate	O
bitmaps	O
.	O
</s>
<s>
Silverlight	B-Application
now	O
uses	O
the	O
graphics	B-Architecture
processing	I-Architecture
unit	I-Architecture
(	O
GPU	B-Architecture
)	O
to	O
accelerate	O
the	O
composition	O
of	O
Visual	O
Trees	O
(	O
like	O
WPF	O
,	O
Silverlight	B-Application
elements	O
correspond	O
to	O
Visual	O
elements	O
,	O
which	O
,	O
when	O
coupled	O
with	O
the	O
layout	O
information	O
,	O
forms	O
a	O
Composition	O
Tree	O
or	O
Visual	O
Tree	O
which	O
is	O
then	O
rendered	O
to	O
form	O
the	O
final	O
display	O
;	O
see	O
WPF	O
architecture	O
)	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
now	O
also	O
supports	O
ClearType	O
text	O
rendering	O
.	O
</s>
<s>
UI	O
elements	O
in	O
Silverlight	B-Application
3	I-Application
supports	O
element-to-element	O
binding	O
—	O
which	O
allows	O
one	O
element	O
to	O
be	O
bound	O
to	O
the	O
state	O
of	O
another	O
element	O
,	O
as	O
well	O
as	O
a	O
validation	O
mechanism	O
for	O
data	O
binding	O
.	O
</s>
<s>
Unlike	O
Silverlight	B-Application
2	O
,	O
which	O
allowed	O
the	O
applications	O
to	O
save	O
files	O
only	O
to	O
the	O
local	O
isostorage	O
,	O
Silverlight	B-Application
3	I-Application
applications	O
can	O
save	O
to	O
any	O
location	O
on	O
the	O
file	O
system	O
via	O
the	O
system	O
Save	O
File	O
dialog	O
.	O
</s>
<s>
However	O
,	O
the	O
path	O
where	O
the	O
file	O
is	O
saved	O
will	O
still	O
be	O
hidden	O
from	O
the	O
Silverlight	B-Application
application	O
.	O
</s>
<s>
Any	O
external	O
assemblies	O
used	O
by	O
Silverlight	B-Application
applications	O
are	O
cached	O
too	O
so	O
that	O
they	O
need	O
not	O
be	O
redownloaded	O
for	O
subsequent	O
instantiations	O
of	O
the	O
application	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
also	O
includes	O
a	O
LocalConnection	O
API	B-Application
to	O
communicate	O
(	O
using	O
a	O
named	B-Operating_System
pipe	I-Operating_System
style	O
model	O
)	O
among	O
multiple	O
running	O
applications	O
on	O
the	O
same	O
machine	O
,	O
irrespective	O
of	O
the	O
browser	O
and	O
can	O
monitor	O
for	O
network	O
connectivity	O
events	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
can	O
optionally	O
use	O
Binary	B-Protocol
XML	I-Protocol
to	O
communicate	O
with	O
WCF	O
services	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
supports	O
Out-of-Browser	O
experiences	O
,	O
i.e.	O
,	O
Silverlight	B-Application
applications	O
can	O
be	O
installed	O
to	O
the	O
system	O
for	O
offline	O
access	O
(	O
provided	O
the	O
application	O
manifest	O
is	O
designed	O
to	O
allow	O
local	O
installation	O
)	O
where	O
they	O
run	O
outside	O
the	O
browser	O
.	O
</s>
<s>
When	O
running	O
outside	O
of	O
a	O
browser	O
,	O
HTML	B-Language
interop	O
is	O
disabled	O
.	O
</s>
<s>
In	O
addition	O
,	O
access	O
to	O
the	O
Function	B-Application
Keys	I-Application
is	O
enabled	O
.	O
</s>
<s>
Locally	O
installed	O
Silverlight	B-Application
applications	O
still	O
run	O
in	O
a	O
sandbox	O
.	O
</s>
<s>
Installed	O
Silverlight	B-Application
3	I-Application
applications	O
automatically	O
check	O
for	O
updates	O
asynchronously	O
on	O
every	O
launch	O
and	O
updates	O
are	O
automatically	O
installed	O
.	O
</s>
<s>
Silverlight	B-Application
3	I-Application
is	O
now	O
listed	O
as	O
a	O
requirement	O
for	O
eFiling	O
income	O
tax	O
returns	O
for	O
free	O
in	O
the	O
US	O
.	O
</s>
<s>
On	O
November	O
18	O
,	O
2009	O
,	O
at	O
the	O
Professional	O
Developers	O
Conference	O
in	O
Los	O
Angeles	O
,	O
Microsoft	O
Corporation	O
unveiled	O
a	O
Beta	O
version	O
of	O
Silverlight	B-Application
4	O
.	O
</s>
<s>
New	O
features	O
in	O
Silverlight	B-Application
4	O
include	O
:	O
</s>
<s>
Support	O
for	O
Google	B-Application
's	I-Application
Chrome	I-Application
browser	O
.	O
</s>
<s>
New	O
hosted	O
browser	O
support	O
for	O
rendering	O
HTML	B-Language
inside	O
Silverlight	B-Application
.	O
</s>
<s>
Deep	B-Operating_System
Zoom	I-Operating_System
performance	O
enhancements	O
.	O
</s>
<s>
WCF	O
rich	B-Application
web	I-Application
application	I-Application
services	O
.	O
</s>
<s>
Additionally	O
,	O
the	O
following	O
features	O
are	O
provided	O
to	O
out-of-browser	O
(	O
locally	O
installed	O
)	O
Silverlight	B-Application
applications	O
that	O
have	O
been	O
explicitly	O
granted	O
"	O
trusted	O
"	O
status	O
:	O
</s>
<s>
Support	O
for	O
local	O
Component	B-Application
Object	I-Application
Model	I-Application
(	O
COM	O
)	O
objects	O
.	O
</s>
<s>
On	O
December	O
2	O
,	O
2010	O
at	O
the	O
Silverlight	B-Application
Firestarter	O
event	O
,	O
Silverlight	B-Application
5	O
beta	O
was	O
announced	O
for	O
release	O
in	O
the	O
1st	O
half	O
of	O
2011	O
.	O
</s>
<s>
New	O
features	O
in	O
Silverlight	B-Application
5	O
include	O
:	O
</s>
