.NET versions and their years of release
http://en.wikipedia.org/wiki/List_of_.NET_Framework_versions
| Version Name | Version Number[1] | Release Date | Mainstream Support Retired | Extended Support Retired | Service Pack Retired |
|---|---|---|---|---|---|
| PDC 2000 (Tech Preview) Release | 2000.14.1812.10 | 2000-07-11 | |||
| 1.0 Beta 1 | 1.0.2204.21 | 2000-11-01 | |||
| 1.0 Beta 2 | 1.0.2914.0 | 2001-06-20 | |||
| 1.0 RTM | 1.0.3705.0 | 2002-03-05[2] | 2007-07-10[3] | 2009-07-14[3] | 2003-03-19 |
| 1.0 SP1 | 1.0.3705.209 | 2002-03-19 | N/A | N/A | 2003-08-07 |
| 1.0 SP2 | 1.0.3705.288 | 2002-08-07[4] | N/A | N/A | 2005-07-21 |
| 1.0 SP3 | 1.0.3705.6018 | 2004-08-25[4] | |||
| 1.1 Final Beta | 1.1.4322.510[5] | 2002-10-19 | |||
| 1.1 RTM | 1.1.4322.573 | 2003-04-01 | 2008-10-14[6] | 2013-10-08[6] | 2005-09-09 |
| 1.1 SP1 | 1.1.4322.2032 | 2004-08-25[5] | |||
| 1.1 SP1 (Server 2003) | 1.1.4322.2300 | 2005-03-30[5] | |||
| 1.1 (KB893251) | 1.1.4322.2310 | 2005-03-25 | |||
| 1.1 (KB927495) | 1.1.4322.2407 | 2007-02-21 | |||
| 1.1 (KB953297) | 1.1.4322.2443 | 2009-10-13 | |||
| 2.0 Beta 1 | 2.0.40607.16 | 2004-07-03 | |||
| 2.0 Beta 2 | 2.0.50215.44 | 2005-04-18 | |||
| 2.0 RTM (x86) | 2.0.50727.42 | 2006-01-22[7] | 2011-04-12[8] | 2016-04-12[8] | 2009-01-13 |
| 2.0 RTM (Vista) | 2.0.50727.312 | 2007-01-30 | |||
| 2.0 (KB928365) | 2.0.50727.832 | 2007-07-10 | |||
| 2.0 SP1 (x86) | 2.0.50727.1433 | 2007-11-19[9] | N/A | N/A | 2010-01-12 |
| 2.0 SP1 (x64) | 2.0.50727.???? | 2007-11-19[10] | N/A | N/A | 2010-01-12 |
| 2.0 SP1 (Server 2008 and Vista SP1) | 2.0.50727.1434 | ||||
| 2.0 SP2 (installed with 3.5 SP1) | 2.0.50727.3053 | 2009-01-16[11] | |||
| 2.0 SP2 (x86) (installed with 3.5 Family Update) | 2.0.50727.3082 | 2008-12-17[11] | |||
| 2.0 SP2 (x64) (installed with 3.5 Family Update) | 2.0.50727.???? | 2009-1-26[11] | |||
| 2.0 SP2 (Vista/Server 2008 - x86) (installed with 3.5 Family Update) | 2.0.50727.???? | 2009-1-26[11] | |||
| 2.0 SP2 (XP, Server 2003 - Without 3.5 Family Update) | 2.0.50727.???? | 2009-1-26[12] | |||
| 2.0 SP2 (KB974417) | 2.0.50727.3603 | 2009-10-13 | |||
| 2.0 SP2 (KB976569) | 2.0.50727.3607 | 2009-10-20 | |||
| 2.0 SP2 (KB983583) | 2.0.50727.3615 | 2010-08-10 | |||
| 2.0 SP2 (Windows Vista SP2 / Server 2008 SP2) | 2.0.50727.4016 | ||||
| 2.0 SP2 (installed with Windows 7 RC) | 2.0.50727.4918 | 2009-05-05 | |||
| 2.0 SP2 (installed with Windows 7 RTM) | 2.0.50727.4927 | 2009-10-22 (General Availability) | |||
| 2.0 SP2 (KB983590) | 2.0.50727.4952 | 2010-08-10 | |||
| 3.0 RTM | 3.0.4506.30 | 2006-11-21[13] | 2011-04-12[14] | 2017-11-04 | |
| 3.0 RTM (Vista) | 3.0.4506.26 | 2007-01-30 | |||
| 3.0 SP1 Beta | 3.0.4506.590 | 2007-07-26 | |||
| 3.0 SP1 | 3.0.4506.648 | 2007-11-19[15] | |||
| 3.0 SP2 | 3.0.4506.2123 | 2009-01-16[11] | |||
| 3.0 SP2 (installed with 3.5 SP1) | 3.0.4506.2254 | 2008-11-xx | |||
| 3.5 Beta 1 | 3.5.20404.0 | 2007-04-19 | |||
| 3.5 Beta 2 | 3.5.20706.1 | 2007-07-26 | |||
| 3.5 RTM | 3.5.21022.8 | 2007-11-20[16] | 2011-04-12[14] | 2018-10-04 | |
| 3.5 SP1 Beta | 3.5.30428.1 | 2008-05-10 | |||
| 3.5 SP1 RTM | 3.5.30729.01 | 2008-11-18[17] | |||
| 3.5 SP1 (Windows 7 Edition) | 3.5.30729.4926 | 2009-07-13 | 2015-01-13[14] | ||
| 4.0 Beta 1 | 4.0.20506 | 2009-05-20 | |||
| 4.0 Beta 2 | 4.0.21006 | 2009-10-19[18](MSDN) 2009-10-21 (General Availability) | |||
| 4.0 RC | 4.0.30128.1 | 2010-02-10 (General Availability) | |||
| 4.0 RTM[19] | 4.0.30319.1 | 2010-04-12 (General Availability) | |||
| 4.0.1 aka 4 update 1[20] | 2011-04-18[21] | ||||
| 4.5 Developer Preview | 4.5.40805 / 4.0.30319.17020 | 2011-09-13 | |||
| 4.5 Beta (Consumer Preview) | 4.5.50131 / 4.0.30319.17379 | 2012-02-29 | |||
| 4.5 RC (Release Preview) | 4.5.50501 / 4.0.30319.17626 | 2012-05-31 | |||
| 4.5 RTM[22] | 4.5.50709 / 4.0.30319.17929 | 2012-08-02 (General Availability) |