<s>
Xamarin	B-Application
is	O
a	O
Microsoft-owned	O
San	O
Francisco-based	O
software	O
company	O
founded	O
in	O
May	O
2011	O
by	O
the	O
engineers	O
that	O
created	O
Mono	B-Application
,	O
Xamarin.Android	O
(	O
formerly	O
Mono	B-Application
for	O
Android	B-Application
)	O
and	O
Xamarin.iOS	O
(	O
formerly	O
MonoTouch	O
)	O
,	O
which	O
are	O
cross-platform	B-Operating_System
implementations	O
of	O
the	O
Common	O
Language	O
Infrastructure	O
(	O
CLI	O
)	O
and	O
Common	O
Language	O
Specifications	O
(	O
often	O
called	O
Microsoft	O
.NET	B-Application
)	O
.	O
</s>
<s>
With	O
a	O
C#	B-Application
-shared	O
codebase	O
,	O
developers	O
can	O
use	O
Xamarin	B-Application
tools	O
to	O
write	O
native	B-Language
Android	B-Application
,	O
iOS	B-Application
,	O
and	O
Windows	O
apps	O
with	O
native	B-Language
user	B-Application
interfaces	I-Application
and	O
share	O
code	O
across	O
multiple	B-Operating_System
platforms	I-Operating_System
,	O
including	O
Windows	O
,	O
macOS	B-Application
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
According	O
to	O
Xamarin	B-Application
,	O
over	O
1.4million	O
developers	O
were	O
using	O
Xamarin	B-Application
's	O
products	O
in	O
120	O
countries	O
around	O
the	O
world	O
as	O
of	O
April	O
2017	O
.	O
</s>
<s>
On	O
February	O
24	O
,	O
2016	O
,	O
Microsoft	O
announced	O
it	O
had	O
signed	O
a	O
definitive	O
agreement	O
to	O
acquire	O
Xamarin	B-Application
.	O
</s>
<s>
In	O
1999	O
Miguel	O
de	O
Icaza	O
and	O
Nat	O
Friedman	O
launched	O
what	O
eventually	O
became	O
known	O
as	O
Ximian	O
to	O
support	O
and	O
develop	O
software	O
for	O
de	O
Icaza	O
's	O
nascent	O
GNOME	B-Application
project	O
.	O
</s>
<s>
After	O
Microsoft	O
first	O
announced	O
their	O
.NET	B-Application
Framework	I-Application
in	O
June	O
2000	O
,	O
de	O
Icaza	O
began	O
investigating	O
whether	O
a	O
Linux	B-Application
version	O
was	O
feasible	O
.	O
</s>
<s>
The	O
Mono	B-Application
open	B-Application
source	I-Application
project	O
was	O
launched	O
on	O
July	O
19	O
,	O
2001	O
.	O
</s>
<s>
After	O
the	O
acquisition	O
,	O
Attachmate	O
announced	O
hundreds	O
of	O
layoffs	O
for	O
the	O
Novell	O
workforce	O
,	O
including	O
Mono	B-Application
developers	O
,	O
putting	O
the	O
future	O
of	O
Mono	B-Application
in	O
question	O
.	O
</s>
<s>
On	O
May	O
16	O
,	O
2011	O
,	O
Miguel	O
de	O
Icaza	O
announced	O
on	O
his	O
blog	O
that	O
Mono	B-Application
would	O
be	O
developed	O
and	O
supported	O
by	O
Xamarin	B-Application
,	O
a	O
newly	O
formed	O
company	O
that	O
planned	O
to	O
release	O
a	O
new	O
suite	O
of	O
mobile	O
products	O
.	O
</s>
<s>
According	O
to	O
de	O
Icaza	O
,	O
at	O
least	O
part	O
of	O
the	O
original	O
Mono	B-Application
team	O
had	O
moved	O
to	O
the	O
new	O
company	O
.	O
</s>
<s>
The	O
name	O
Xamarin	B-Application
comes	O
from	O
the	O
name	O
of	O
the	O
Tamarin	B-Language
monkey	O
,	O
replacing	O
the	O
leading	O
T	O
with	O
an	O
X	O
.	O
</s>
<s>
After	O
Xamarin	B-Application
was	O
announced	O
,	O
the	O
future	O
of	O
the	O
project	O
was	O
questioned	O
since	O
MonoTouch	O
and	O
Mono	B-Application
for	O
Android	B-Application
would	O
now	O
be	O
in	O
direct	O
competition	O
with	O
the	O
existing	O
commercial	O
offerings	O
owned	O
by	O
Attachmate	O
.	O
</s>
<s>
It	O
was	O
not	O
known	O
at	O
that	O
time	O
how	O
Xamarin	B-Application
would	O
prove	O
they	O
had	O
not	O
illegally	O
used	O
technologies	O
previously	O
developed	O
when	O
they	O
were	O
employed	O
by	O
Novell	O
for	O
the	O
same	O
work	O
.	O
</s>
<s>
In	O
July	O
2011	O
,	O
however	O
,	O
Novell	O
–	O
now	O
a	O
subsidiary	O
of	O
Attachmate	O
–	O
and	O
Xamarin	B-Application
announced	O
that	O
Novell	O
had	O
granted	O
a	O
perpetual	O
license	O
to	O
Xamarin	B-Application
for	O
Mono	B-Application
,	O
MonoTouch	O
and	O
Mono	B-Application
for	O
Android	B-Application
,	O
and	O
Xamarin	B-Application
formally	O
and	O
legally	O
took	O
official	O
stewardship	O
of	O
the	O
project	O
.	O
</s>
<s>
In	O
December	O
2012	O
,	O
Xamarin	B-Application
released	O
Xamarin.Mac	O
,	O
a	O
plugin	O
for	O
the	O
existing	O
MonoDevelop	B-Language
Integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	O
)	O
,	O
which	O
allows	O
developers	O
to	O
build	O
C#	B-Application
-based	O
applications	O
for	O
the	O
Apple	O
's	O
macOS	B-Application
operating	O
system	O
and	O
package	O
them	O
for	O
publishing	O
via	O
the	O
App	B-Application
Store	I-Application
.	O
</s>
<s>
In	O
February	O
2013	O
,	O
Xamarin	B-Application
announced	O
the	O
release	O
of	O
Xamarin	B-Application
2.0	O
.	O
</s>
<s>
The	O
release	O
included	O
two	O
main	O
components	O
:	O
Xamarin	B-Application
Studio	O
,	O
a	O
re-branding	O
of	O
its	O
open-source	O
IDE	O
Monodevelop	B-Language
;	O
and	O
integration	O
with	O
Visual	B-Application
Studio	I-Application
,	O
Microsoft	O
's	O
IDE	O
for	O
the	O
.NET	B-Application
Framework	I-Application
,	O
allowing	O
Visual	B-Application
Studio	I-Application
to	O
be	O
used	O
for	O
creating	O
applications	O
for	O
Android	B-Application
,	O
iOS	B-Application
and	O
Windows	O
.	O
</s>
<s>
On	O
July	O
17	O
,	O
2013	O
,	O
Xamarin	B-Application
announced	O
that	O
they	O
had	O
closed	O
$16million	O
in	O
Series	O
B	O
funding	O
led	O
by	O
Lead	O
Edge	O
Capital	O
.	O
</s>
<s>
On	O
August	O
21	O
,	O
2014	O
,	O
Xamarin	B-Application
successfully	O
closed	O
an	O
additional	O
$54million	O
in	O
Series	O
C	O
funding	O
,	O
which	O
is	O
one	O
of	O
the	O
largest	O
rounds	O
of	O
funding	O
ever	O
raised	O
by	O
a	O
mobile	B-Application
app	I-Application
development	O
platform	O
.	O
</s>
<s>
On	O
February	O
24	O
,	O
2016	O
,	O
Xamarin	B-Application
and	O
Microsoft	O
announced	O
that	O
Microsoft	O
signed	O
a	O
definitive	O
agreement	O
to	O
acquire	O
Xamarin	B-Application
.	O
</s>
<s>
At	O
Microsoft	O
Build	O
2016	O
Microsoft	O
announced	O
that	O
they	O
will	O
open-source	O
the	O
Xamarin	B-Application
SDK	O
and	O
that	O
they	O
will	O
bundle	O
it	O
as	O
a	O
free	O
tool	O
within	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
's	O
integrated	B-Application
development	I-Application
environment	I-Application
,	O
and	O
Visual	B-Application
Studio	I-Application
Enterprise	O
users	O
would	O
also	O
get	O
Xamarin	B-Application
's	O
enterprise	O
features	O
free	O
of	O
charge	O
.	O
</s>
<s>
As	O
a	O
part	O
of	O
the	O
acquisition	O
they	O
would	O
also	O
relicense	O
Mono	B-Application
completely	O
under	O
the	B-License
MIT	I-License
License	I-License
and	O
would	O
release	O
all	O
other	O
Xamarin	B-Application
SDK	O
software	O
through	O
the	O
.NET	B-Application
Foundation	O
also	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
The	O
Xamarin	B-Application
company	O
produces	O
an	O
open	B-Application
source	I-Application
software	O
platform	O
by	O
the	O
same	O
name	O
,	O
and	O
Xamarin	B-Application
2.0	O
was	O
released	O
in	O
February	O
2013	O
.	O
</s>
<s>
Xamarin	B-Application
extends	O
the	O
.NET	B-Application
developer	O
platform	O
with	O
tools	O
and	O
libraries	O
specifically	O
for	O
building	O
apps	O
for	O
Android	B-Application
,	O
iOS	B-Application
,	O
tvOS	B-Operating_System
,	O
watchOS	B-Device
,	O
macOS	B-Application
,	O
and	O
Windows	O
(	O
UWP	O
)	O
primarily	O
with	O
C#	B-Application
in	O
Visual	B-Application
Studio	I-Application
.	O
</s>
<s>
Developers	O
can	O
re-use	O
their	O
existing	O
C#	B-Application
code	O
,	O
and	O
share	O
significant	O
code	O
across	O
device	O
platforms	O
.	O
</s>
<s>
Xamarin	B-Application
integrates	O
with	O
Visual	B-Application
Studio	I-Application
,	O
Microsoft	O
's	O
IDE	O
for	O
the	O
.NET	B-Application
Framework	I-Application
,	O
and	O
subsequently	O
is	O
available	O
for	O
use	O
by	O
macOS	B-Application
users	O
through	O
Visual	B-Application
Studio	I-Application
for	O
Mac	O
.	O
</s>
<s>
Xamarin	B-Application
also	O
released	O
a	O
component	O
store	O
to	O
integrate	O
backend	O
systems	O
,	O
3rd	O
party	O
libraries	O
,	O
cloud	O
services	O
and	O
UI	O
controls	O
directly	O
into	O
mobile	B-Application
apps	I-Application
.	O
</s>
<s>
Introduced	O
in	O
Xamarin	B-Application
3	O
on	O
May	O
28	O
,	O
2014	O
,	O
and	O
allows	O
one	O
to	O
use	O
portable	O
controls	O
subsets	O
that	O
are	O
mapped	O
to	O
native	B-Language
controls	O
of	O
Android	B-Application
,	O
iOS	B-Application
and	O
Windows	O
Phone	O
.	O
</s>
<s>
It	O
is	O
also	O
possible	O
to	O
target	O
other	O
different	O
platforms	O
such	O
as	O
Tizen	O
(	O
by	O
Samsung	O
)	O
,	O
GTK	O
(	O
Linux	B-Application
)	O
,	O
WPF	O
and	O
macOS	B-Application
even	O
though	O
they	O
have	O
stayed	O
in	O
Preview	O
.	O
</s>
<s>
Microsoft	O
has	O
modified	O
this	O
framework	O
to	O
work	O
with	O
the	O
Universal	B-Device
Windows	I-Device
Platform	I-Device
.	O
</s>
<s>
Microsoft	O
enables	O
native	B-Language
mobile	O
development	O
with	O
Blazor	B-Operating_System
.	O
</s>
<s>
Mobile	O
Blazor	B-Operating_System
Bindings	O
allow	O
developers	O
to	O
build	O
native	B-Language
Android	B-Application
and	O
iOS	B-Application
using	O
C#	B-Application
,	O
.NET	B-Application
,	O
and	O
web	O
programming	O
patterns	O
.	O
</s>
<s>
Uno	B-Application
Platform	I-Application
also	O
supports	O
.NET-based	O
native	B-Language
mobile	O
development	O
.	O
</s>
<s>
At	O
Microsoft	O
Build	O
2020	O
,	O
Microsoft	O
announced	O
that	O
Xamarin.Forms	O
was	O
going	O
to	O
be	O
merged	O
into	O
.NET	B-Application
6	I-Application
as	O
.NET	B-Application
Multi-platform	B-Operating_System
App	B-Application
UI	O
(	O
.NET	B-Application
MAUI	I-Application
)	O
.	O
</s>
<s>
.NET	B-Application
MAUI	I-Application
adds	O
macOS	B-Application
support	O
via	O
Mac	O
Catalyst	O
.	O
</s>
<s>
On	O
May	O
23rd	O
,	O
2022	O
during	O
Microsoft	O
Build	O
2022	O
,	O
.NET	B-Application
MAUI	I-Application
was	O
released	O
.	O
</s>
<s>
Microsoft	O
stated	O
that	O
they	O
will	O
continue	O
supporting	O
Xamarin	B-Application
until	O
it	O
is	O
fully	O
replaced	O
by	O
.NET	B-Application
MAUI	I-Application
in	O
May	O
2024	O
.	O
</s>
<s>
Xamarin	B-Application
Test	O
Cloud	O
makes	O
it	O
possible	O
to	O
test	O
mobile	B-Application
apps	I-Application
written	O
in	O
any	O
language	O
on	O
real	O
,	O
non-jailbroken	O
devices	O
in	O
the	O
cloud	O
.	O
</s>
<s>
Xamarin	B-Application
Test	O
Cloud	O
uses	O
object-based	O
UI	O
testing	O
to	O
simulate	O
real	O
user	O
interactions	O
.	O
</s>
<s>
Xamarin	B-Application
is	O
a	O
.NET	B-Application
developer	O
platform	O
made	O
up	O
of	O
tools	O
,	O
programming	O
languages	O
,	O
and	O
libraries	O
for	O
building	O
many	O
different	O
types	O
of	O
applications	O
.	O
</s>
<s>
Xamarin	B-Application
supplies	O
add-ins	O
to	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
that	O
allows	O
developers	O
to	O
build	O
Android	B-Application
,	O
iOS	B-Application
,	O
and	O
Windows	O
apps	O
within	O
the	O
IDE	O
using	O
code	O
completion	O
and	O
IntelliSense	O
.	O
</s>
<s>
Xamarin	B-Application
for	O
Visual	B-Application
Studio	I-Application
also	O
has	O
extensions	O
that	O
provide	O
support	O
for	O
the	O
building	O
,	O
deploying	O
,	O
and	O
debugging	O
of	O
apps	O
on	O
a	O
simulator	O
or	O
a	O
device	O
.	O
</s>
<s>
In	O
late	O
2013	O
,	O
Xamarin	B-Application
and	O
Microsoft	O
announced	O
a	O
partnership	O
that	O
included	O
further	O
technical	O
integration	O
and	O
customer	O
programs	O
to	O
make	O
it	O
possible	O
for	O
their	O
joint	O
developer	O
bases	O
to	O
build	O
for	O
all	O
mobile	O
platforms	O
.	O
</s>
<s>
In	O
addition	O
,	O
Xamarin	B-Application
now	O
includes	O
support	O
for	O
Microsoft	O
Portable	O
Class	O
Libraries	O
and	O
most	O
C#	B-Application
5.0	O
features	O
such	O
as	O
async/await	O
.	O
</s>
<s>
CEO	O
and	O
co-founder	O
of	O
Xamarin	B-Application
,	O
Nat	O
Friedman	O
,	O
announced	O
the	O
alliance	O
at	O
the	O
launch	O
of	O
Visual	B-Application
Studio	I-Application
2013	O
in	O
New	O
York	O
.	O
</s>
<s>
Xamarin	B-Application
is	O
useful	O
in	O
developing	O
iOS	B-Application
and	O
Android	B-Application
apps	O
.	O
</s>
<s>
On	O
March	O
31	O
,	O
2016	O
,	O
Microsoft	O
announced	O
that	O
they	O
were	O
merging	O
all	O
of	O
Xamarin	B-Application
's	O
software	O
with	O
every	O
version	O
of	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
including	O
Visual	B-Application
Studio	I-Application
Community	O
,	O
and	O
this	O
added	O
various	O
Xamarin	B-Application
features	O
to	O
come	O
pre-installed	O
in	O
Visual	B-Application
Studio	I-Application
such	O
as	O
an	O
iOS	B-Application
emulator	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
its	O
release	O
in	O
February	O
2013	O
,	O
Xamarin	B-Application
Studio	O
was	O
a	O
standalone	O
IDE	O
for	O
mobile	B-Application
app	I-Application
development	O
on	O
Windows	O
and	O
macOS	B-Application
,	O
as	O
part	O
of	O
Xamarin	B-Application
2.0	O
based	O
on	O
the	O
open	B-Application
source	I-Application
project	O
MonoDevelop	B-Language
.	O
</s>
<s>
In	O
addition	O
to	O
a	O
debugger	O
,	O
Xamarin	B-Application
Studio	O
includes	O
code	O
completion	O
in	O
C#	B-Application
,	O
an	O
Android	B-Application
UI	O
builder	O
for	O
creating	O
user	B-Application
interfaces	I-Application
without	O
XML	O
,	O
and	O
integration	O
with	O
Xcode	O
Interface	O
Builder	O
for	O
iOS	B-Application
app	B-Application
design	O
.	O
</s>
<s>
On	O
Windows	O
Xamarin	B-Application
Studio	O
is	O
now	O
deprecated	O
and	O
was	O
replaced	O
with	O
Xamarin	B-Application
for	O
Visual	B-Application
Studio	I-Application
.	O
</s>
<s>
On	O
macOS	B-Application
Xamarin	B-Application
Studio	O
is	O
still	O
in	O
development	O
,	O
but	O
was	O
rebranded	O
in	O
2016	O
as	O
Visual	B-Application
Studio	I-Application
for	O
Mac	O
.	O
</s>
<s>
Xamarin.Mac	O
was	O
created	O
as	O
a	O
tool	O
for	O
Apple	O
technology	O
application	O
development	O
using	O
the	O
C#	B-Application
programming	O
language	O
.	O
</s>
<s>
Xamarin.Mac	O
,	O
as	O
with	O
Xamarin.iOS	O
and	O
Xamarin.Android	O
,	O
gives	O
developers	O
up	O
to	O
90%	O
of	O
code	O
reuse	O
across	O
Android	B-Application
,	O
iOS	B-Application
and	O
Windows	O
.	O
</s>
<s>
Xamarin.Mac	O
gives	O
C#	B-Application
developers	O
the	O
ability	O
to	O
build	O
fully	O
native	B-Language
Cocoa	B-Operating_System
apps	O
for	O
macOS	B-Application
and	O
allows	O
for	O
native	B-Language
apps	O
that	O
can	O
be	O
put	O
into	O
the	O
Mac	B-Application
App	I-Application
Store	I-Application
.	O
</s>
<s>
Xamarin	B-Application
's	O
.NET	B-Application
Mobility	O
Scanner	O
lets	O
developers	O
see	O
how	O
much	O
of	O
their	O
.NET	B-Application
code	O
can	O
run	O
on	O
other	O
operating	O
systems	O
,	O
specifically	O
Android	B-Application
,	O
iOS	B-Application
,	O
Windows	O
Phone	O
,	O
and	O
Windows	O
Store	O
.	O
</s>
<s>
In	O
October	O
2015	O
Xamarin	B-Application
announced	O
that	O
they	O
had	O
acquired	O
the	O
Swedish	O
RoboVM	O
for	O
Java	B-Language
developer	O
platform	O
akin	O
to	O
its	O
offerings	O
,	O
the	O
reason	O
stated	O
by	O
Xamarin	B-Application
for	O
the	O
acquisition	O
was	O
that	O
if	O
they	O
developed	O
a	O
Java-based	O
platform	O
from	O
the	O
ground	O
up	O
,	O
their	O
end	O
product	O
would	O
be	O
similar	O
to	O
RoboVM	O
so	O
they	O
acquired	O
the	O
company	O
instead	O
;	O
as	O
a	O
result	O
RoboVM	O
operates	O
independently	O
of	O
the	O
Xamarin	B-Application
team	O
.	O
</s>
<s>
RoboVM	O
enables	O
developers	O
to	O
build	O
Java	B-Language
apps	O
for	O
iOS	B-Application
and	O
Android	B-Application
with	O
fully	O
native	B-Language
UIs	O
,	O
native	B-Language
performances	O
,	O
and	O
all	O
Java	B-Language
apps	O
have	O
the	O
complete	O
access	O
to	O
the	O
APIs	O
of	O
each	O
developer	O
platform	O
.	O
</s>
<s>
BugVM	O
,	O
a	O
fork	O
of	O
RoboVM	O
was	O
created	O
to	O
maintain	O
the	O
free	O
open	B-Application
source	I-Application
status	O
.	O
</s>
<s>
In	O
2013	O
,	O
Xamarin	B-Application
acquired	O
the	O
mobile	B-Application
application	I-Application
testing	O
platform	O
LessPainful	O
.	O
</s>
<s>
In	O
2015	O
,	O
Xamarin	B-Application
acquired	O
the	O
Java	B-Language
application	O
development	O
platform	O
RoboVM	O
.	O
</s>
