title: PowerShell parameter value suggestions
body: <p>I have written a Cmdlet in C#. Is it possible to provide all possible values for a specific string Parameter ("PackageId" is this sample)?</p>
  
  <pre><code>public sealed class InstallPackageCommand : PSCmdlet
  {
      [Parameter(Position = 0, Mandatory = true)]
      public string PackageId { get; set; }
  
      protected override void BeginProcessing()
      {
         //...
      }
  } 
  </code></pre>