If you want to permanently and completely detach the solution from source control, then try the following:
Click the 'No' button to avoid connecting to TFS.
In the file menu, go to the source control options and clear the bindings. You'll specifically want File - Source Control - Advanced - Change Source Control...
Save the solution.
Next time you open the solution you won't be prompted to connect to TFS.
I don't have enough reputation to comment, but just wanted to add that Tabish's solution does in fact work correctly to completely remove the solution from source control, especially when the TFS server is not reachable for one reason or another (e.g. you downloaded a project that the author did not remove from their own source control before uploading).
However, to completely remove all traces of source control from the project and avoid the warnings that are noted in the other comments to that answer (e.g. "The mappings for the solution could not be found..."), you must also remove the following lines from every project file in the solution (apparently these used to be in the solution file in earlier versions of VS, but in VS2017 they are found in the project file for each project in the solution - e.g. [project].csproj):
I just inherited a collection of TeamFoundation projects following an M&A buyout and tech transfer. There were like 30+ solutions and a buttload of *.vssscc and *.vspscc files.
Based on everyone's input above, I wrote a PowerShell function to recurse a specified root folder, delete the files, then edit the solution files to remove the TeamFoundationVersionControl section.
Usage is Remove_TFSfiles "pathname" $booleanflag.
To see what files would be affected, use $false (uses -whatif):
Remove_TFSfiles "C:\MyDevFolder" $false
To actually delete those files, use $true:
Remove_TFSfiles "C:\MyDevFolder" $true
Here's the function:
Function Remove_TFSfiles {
param(
[string]$FolderName = $(throw "-FolderName is required."),
[bool]$RemoveFiles = $(throw "-RemoveFiles (either $true or $false) is required.")
)
$TFSExtensions = '*.vspscc', '*.vssscc'
if ($RemoveFiles) {
Get-ChildItem -path $FolderName -force -include $TFSExtensions -Recurse | Remove-Item -Force
# Now iterate through any solution files, and whack the TeamFoundationVersionControl section
Get-ChildItem -Path $FolderName -Filter "*.sln" -Recurse | ForEach-Object {
$slnFilename = $_.Fullname
Write-Host -NoNewline "Editing $slnFilename... "
$File = Get-Content $slnFilename -raw
$Filestr = [regex]::escape("" + $File + "")
# The regex escapes must themselves be meta-escaped, therefore "\(" becomes "\\" + "\(" = "\\\(". Did I mention I hate regex?
$Result = $Filestr -replace "\\tGlobalSection\\\(TeamFoundationVersionControl\\\).*?EndGlobalSection\\r\\n", ""
$result = [regex]::unescape($result)
Set-ItemProperty $slnFilename IsReadOnly $false
$result | Set-Content $slnFilename
Write-Host "Done"
}
Write-Host -f red "Finished actually removing files and editing *.sln files"
}
else {
Get-ChildItem -path $FolderName -force -include $TFSExtensions -Recurse | Remove-Item -WhatIf
Write-Host -f green "Finished pretending to remove files"
# Now iterate through any solution files, and whack the TeamFoundationVersionControl section
Get-ChildItem -Path $FolderName -Filter "*.sln" -Recurse | ForEach-Object {
$slnFilename = $_.Fullname
Write-Host "Not Editing $slnFilename"
}
}
}