Concatenate strings and expression results in PowerShell

I want to write out the current process ID in PowerShell. This works:

$processId = $([System.Diagnostics.Process]::GetCurrentProcess()).Id
Write-Output "My process ID is $processId"

However, I want to do it in one line, if possible. Substituting the $([System.Diagnostics.Process]::GetCurrentProcess()开发者_StackOverflow中文版).Id for the variable doesn't seem to evaluate the expression.

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'My process id is {0}' -f [System.Diagnostics.Process]::GetCurrentProcess().Id

And if we use automatic variables:

'My process id is {0}' -f $pid

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This might be a tad simpler:

$pid

or

"My process id is $pid"

For more info about automatic variables execute:

man about_automatic_variables

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Write-Output "My process ID is $([System.Diagnostics.Process]::GetCurrentProcess().Id)"

Basically you just needed to move the closing parenthesis after the Id.