Commands/Types.PS1XML/Write-PropertySet.ps1

function Write-PropertySet
{
    <#
    .Synopsis
        Writes a property set
    .Description
        Writes a property set.
 
        Property sets are a way to conveniently access sets of properties on an object.
 
        Instead of writing:
 
            Select-Object a,b,c,d
 
        You can write:
 
            Select-Object mypropertyset
    .Example
        Write-PropertySet -typename System.IO.FileInfo -name filetimes -propertyname Name, LastAccessTime, CreationTime, LastWriteTime |
            Out-TypeData |
            Add-TypeData
 
        dir | select filetimes
    .Link
        ConvertTo-PropertySet
    .Link
        Get-PropertySet
    .Link
        Out-TypeData
    .Link
        Add-TypeData
    #>

    param(
    # The typename for the property set
    [Parameter(Mandatory=$true,ValueFromPipelineByPropertyName=$true)]
    [string]
    $TypeName,

    # The name of the property set
    [Parameter(Mandatory=$true,ValueFromPipelineByPropertyName=$true)]
    [string]
    $Name,

    # The names of the properties to include in the property set
    [Parameter(Mandatory=$true,ValueFromPipelineByPropertyName=$true)]
    [string[]]
    $PropertyName
    )
    begin {
        [Hashtable]$PropertySet = @{}
    }
    process {
        $PropertySet.$name = $PropertyName
    }
    end {
        Write-TypeView -TypeName $TypeName -PropertySet $PropertySet
    }
}