How to expand member-variables in Write-Host or double quotes?

I have written a PS script and for diagnos开发者_JS百科tic purpose am echoing messages to screen using Write-Host. This is fine as long as I have to expand normal variable like

Write-Host "Hello World, $name"

Problem starts when i try to echo some member variable as below

Write-Host "Hello World, $Person.Name"

This does not expand as expected. The work around that am following is, to use temp variable as below

$personName  = $Person.Name
Write-Host "Hello World, $personName"

Is there an elegant way of doing this with out the use of temp variable?

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If you want to use property access within double-quoted strings, you need a subexpression:

"Foo $($bar.Property)"

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Try this:

$dir = ls
Write-Host "Dir elements:" $dir.Length