I currently use the answer to a similar question for Visual Studio 2010 as my go to hgignore file. Are there any notable additions to include with VS2012?
Below is a compiled list from many different sources. Gist here.
I have found that projects upgraded from VS2010 have a lot of backup and upgrade log files not required.
# use glob syntax
syntax: glob
*.obj
*.pdb
*.user
*.aps
*.pch
*.vspscc
*.vssscc
*_i.c
*_p.c
*.ncb
*.suo
*.tlb
*.tlh
*.bak
*.[Cc]ache
*.ilk
*.log
*.lib
*.sbr
*.scc
[Bb]in
[Dd]ebug*/
obj/
[Rr]elease*/
_ReSharper*/
[Tt]humbs.db
[Tt]est[Rr]esult*
[Bb]uild[Ll]og.*
*.[Pp]ublish.xml
*.resharper
# For projects upgraded from VS2010
[Bb]ackup/
_UpgradeReport_Files/
UpgradeLog.*
*.opensdf
*.sdf
ipch/
x64/
By pulling from this previous answer about Visual Studio 2010, from this response in this question, and this wonderful citation I compiled this listing:
############################################################
## Visual Studio 2012
############################################################
syntax: glob
## User-specific files
*.suo
*.user
*.sln.docstates
## Build results
[Dd]ebug/
[Rr]elease/
x64/
build/
[Bb]in/
[Oo]bj/
## MSTest test Results
[Tt]est[Rr]esult*/
[Bb]uild[Ll]og.*
*_i.c
*_p.c
*.ilk
*.meta
*.obj
*.pch
*.pdb
*.pgc
*.pgd
*.rsp
*.sbr
*.tlb
*.tli
*.tlh
*.tmp
*.tmp_proj
*.log
*.vspscc
*.vssscc
.builds
*.pidb
*.scc
## Visual C++ cache files
ipch/
*.aps
*.ncb
*.opensdf
*.sdf
*.cachefile
## Visual Studio profiler
*.psess
*.vsp
*.vspx
## Guidance Automation Toolkit
*.gpState
## ReSharper Ignores
_ReSharper*/
*.[Rr]e[Ss]harper
## TeamCity Ignores
_TeamCity*
## DotCover Ignores
*.dotCover
## NCrunch Ignores
*.ncrunch*
.*crunch*.local.xml
## Installshield output folder
[Ee]xpress/
## DocProject Ignores
DocProject/buildhelp/
DocProject/Help/*.HxT
DocProject/Help/*.HxC
DocProject/Help/*.hhc
DocProject/Help/*.hhk
DocProject/Help/*.hhp
DocProject/Help/Html2
DocProject/Help/html
## Click-Once Ignores
publish/
## Publish Web Output
*.Publish.xml
*.pubxml
## Windows Azure Build Ignores
csx
*.build.csdef
## Windows Store Ignores
AppPackages/
## RIA/Silverlight projects
Generated_Code/
## SQL Server Ignores
App_Data/*.mdf
App_Data/*.ldf
## Backup & Report Files when converting a solution
## Not required, we have mercurial!
_UpgradeReport_Files/
Backup*/
UpgradeLog*.XML
UpgradeLog*.htm
## NuGet
packages/
## Miscellaneous Ignores
sql/
*.Cache
ClientBin/
[Ss]tyle[Cc]op.*
~$*
*~
*.dbmdl
*.[Pp]ublish.xml
*.pfx
*.publishsettings
## Windows Ignores
$RECYCLE.BIN/
Thumbs.db
ehthumbs.db
Desktop.ini
This is currently working great in my repositories.