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Accessing the Values of Properties

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We need to be able to access the values of properties to make decisions.  There are multiple ways to do this.
Using Select-Object
PS C:\> Get-Volume | Select-Object -ExpandProperty Size
471855104
366997504
255919648768
255919648768
515895296
116280782848
9694433280

Using dot notation
PS C:\> (Get-Volume).Size
471855104
366997504
255919648768
255919648768
515895296
116280782848
9694433280

Using a variable
PS C:\> $Data = Get-Volume

PS C:\> $Data.Size
471855104
366997504
255919648768
255919648768
515895296
116280782848
9694433280

Using array syntax
PS C:\> $Data[0].Size
471855104

You have access to all information in a property.  Just choose the method that works best for you and your situation. The important thing to remember is that Get-Member shows you the correct property name to use.  Some formatted output changes the property names.
PS C:\> Get-Process | Select-Object -First 1

Handles  NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id  SI ProcessName                
-------  ------    -----      ----- -----   ------     --  -- -----------                
    106      10     1564       3640    91    73.70   7080   1 ApMsgFwd 

Notice the name of the column CPU(S).  If you try to use it, you will not get good results.
PS C:\> Get-Process | Select-Object -Property "CPU(S)"

CPU(S)
------
      

Using Get-Member you will discover that the correct name of the property is actually CPU.  Now you get the correct results.
PS C:\> Get-Process | Select-Object -Property "CPU"

        CPU
        ---
  73.828125
   46.34375
   52.03125



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