Delete all CSV files except for 1 specifid CSV file

I would like to use a simple script  to delete all *.csv files found in C:\Temp1\...  except for one file called Output.csv

It would be in Batch, .ps1 or vbs..

Thanks in advance.
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In test mode; remove the -WhatIf to run it for real:
Get-ChildItem C:\Temp1 -Filter *.csv | Where-Object {$_.BaseName -ne 'output'} | Remove-Item -Force -WhatIf

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For the fun of it, here's a cmd.exe version, for immediate execution in a command prompt.
As before in test mode; remove the uppercase ECHO to run it for real:
for %a in ("C:\Temp1\*.csv") do @(if /i not "%~na"=="Output" ECHO del "%~a")

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For a batch script, double up on those percent signs of the loop variable:
for %%a in ("C:\Temp1\*.csv") do @(if /i not "%%~na"=="Output" ECHO del "%%~a")

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Julian HansenCommented:
You can do it in one - but a potentially safer method would be to break your script into 3 parts
1. Rename the file to .preserve
2. Remove all .csv files
3. Rename the file back again

This has the added advantage that your delete does not have to be updated if names change or you want to expand to include additional names.
100questionsAuthor Commented:
Thanks very much.
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