It’s a good idea to add a .gitignore file to your Git-repository, to keep Git from keeping track of certain files and/or folders. This could be Visual Studio debug/build files, etc.
The problem in Windows however, is that you can’t just create a text file and rename it to “.gitignore”, as you’ll see the error:

A little trick, is to create a text file and rename it to:
 [code].gitignore.[/code]
Windows now lets you create the file.
Here’s a sample .gitignore, which tells Git to ignore the most common files not needed in the repository.
 Place the file in your Git-repositories root directory (/projectname/.gitignore).
[code]
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
# User-specific files
 *.suo
 *.user
 *.sln.docstates
# Build results
[Dd]ebug/
 [Rr]elease/
 x64/
 build/
 #[Bb]in/ #(Keep "bin" folder in repo. Uncomment to remove)
 [Oo]bj/
# Enable "build/" folder in the NuGet Packages folder since NuGet packages use it for MSBuild targets
 !packages/*/build/
# 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 is a .NET coding add-in
 _ReSharper*/
 *.[Rr]e[Ss]harper
# TeamCity is a build add-in
 _TeamCity*
# DotCover is a Code Coverage Tool
 *.dotCover
# NCrunch
 *.ncrunch*
 .*crunch*.local.xml
# Installshield output folder
 [Ee]xpress/
# DocProject is a documentation generator add-in
 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 directory
 publish/
# Publish Web Output
 *.Publish.xml
 *.pubxml
# NuGet Packages Directory
 ## TODO: If you have NuGet Package Restore enabled, uncomment the next line
 #packages/
# Windows Azure Build Output
 csx
 *.build.csdef
# Windows Store app package directory
 AppPackages/
# Others
 sql/
 *.Cache
 ClientBin/
 [Ss]tyle[Cc]op.*
 ~$*
 *~
 *.dbmdl
 *.[Pp]ublish.xml
 *.pfx
 *.publishsettings
# RIA/Silverlight projects
 Generated_Code/
# Backup & report files from converting an old project file to a newer
 # Visual Studio version. Backup files are not needed, because we have git ;-)
 _UpgradeReport_Files/
 Backup*/
 UpgradeLog*.XML
 UpgradeLog*.htm
# SQL Server files
 App_Data/*.mdf
 App_Data/*.ldf
# =========================
 # Windows detritus
 # =========================
# Windows image file caches
 Thumbs.db
 ehthumbs.db
# Folder config file
 Desktop.ini
# Recycle Bin used on file shares
 $RECYCLE.BIN/
# Mac crap
 .DS_Store
 [/code]