############################################################################
# Show-WmiClass - Show WMI classes
# Author: Microsoft
# Version: 1.0
# NOTE: Notice that this is uses the verb SHOW vs GET.  That is because it
#       combines a Getter with a format.  SHOW was added as a new "official
#       verb to deal with just this case.
############################################################################
param(
$Name = ".",
$NameSpace = "root\cimv2",
[Switch]$Refresh=$false
)

# Getting a list of classes can be expensive and the list changes infrequently.  
# This makes it a good candidate for caching.

$CacheDir  = Join-path $env:Temp "WMIClasses"
$CacheFile = Join-Path $CacheDir ($Namespace.Replace("\","-") + ".csv")
if (!(Test-Path $CacheDir))
{
    $null = New-Item -Type Directory -Force $CacheDir
}

if (!(Test-Path $CacheFile) -Or $Refresh)
{
    Get-WmiObject -List -Namespace:$Namespace  |
        Sort   -Property Name |
        Select -Property Name |
        Export-csv -Path $CacheFile -Force
}

Import-csv -Path $CacheFile | 
    where {$_.Name -match $Name} |
    Format-Wide -AutoSize