[Solved] You have this function:function Remove-Log { param($File) if ($PSCmdlet.ShouldProcess($File)) { Remove-Item $File } }When running Remove-Log -File 'log.txt' -WhatIf, it throws an error.... | PowerShell

PowerShell - Scripting Best Practices

You have this function:

function Remove-Log {
  param($File)
  if ($PSCmdlet.ShouldProcess($File)) {
    Remove-Item $File
  }
}

When running Remove-Log -File 'log.txt' -WhatIf, it throws an error. What is the likely cause?

ARemove-Item does not support -WhatIf

BThe function lacks the CmdletBinding attribute with SupportsShouldProcess enabled

CThe parameter $File is not declared as mandatory

DThe function is missing a return statement

Step-by-Step Solution

Solution:

Step 1: Check CmdletBinding attribute
For $PSCmdlet.ShouldProcess to work properly and support -WhatIf, the function must have [CmdletBinding(SupportsShouldProcess=$true)].
Step 2: Understand Remove-Item support
Remove-Item supports -WhatIf natively, so that is not the issue.
Step 3: Parameter and return statements
Mandatory parameters or return statements do not affect -WhatIf support.
Final Answer:
The function lacks the CmdletBinding attribute with SupportsShouldProcess enabled -> Option B
Quick Check:
CmdletBinding with SupportsShouldProcess required [OK]

Quick Trick: CmdletBinding with SupportsShouldProcess enables -WhatIf [OK]

Common Mistakes:

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