Invoking multiple PowerShell commands one at a time from C#

1. Before PR #8057

var sessionState = InitialSessionState.CreateDefault();
sessionState.ImportPSModule(new string[] { "AzureRM.Profile" });

using (var psRunspace = RunspaceFactory.CreateRunspace(sessionState))
{
    using (var ps = PowerShell.Create())
    {
        // This is not intuitive and an unnecessary annoyance
        ps.Runspace = psRunspace;

        ps.AddCommand("Connect-AzureRmAccount")
          .AddParameter("ServicePrincipal")
          .AddParameter("TenantId", tenantName)
          .AddParameter("Subscription", subscriptionId)
          .AddParameter("Credential", credential);

        var results = ps.Invoke();

        // Process results
    }

    // Additional code here

    using (var ps = PowerShell.Create())
    {
        // Again, not intuitive, easily forgotten
        ps.Runspace = psRunspace;

        ps.AddCommand("Get-AzureRMVM")
          .AddParameter("ResourceGroupName", resourceGroupName)
          .AddParameter("Name", vmName);

        var results = ps.Invoke();

        // Work with VM
    }
}

2. After PR #8057

var sessionState = InitialSessionState.CreateDefault();
sessionState.ImportPSModule(new string[] { "AzureRM.Profile" });

using (var psRunspace = RunspaceFactory.CreateRunspace(sessionState))
{
    // This is much more expressive - create a new PS instance in the runspace provided.
    // It also helps raise visibility that you can use this model (which is necessary
    // if you want to invoke multiple PS commands one at a time from a non PS .NET assembly).
    using (var ps = PowerShell.Create(psRunspace))
    {
        ps.AddCommand("Connect-AzureRmAccount")
          .AddParameter("ServicePrincipal")
          .AddParameter("TenantId", tenantName)
          .AddParameter("Subscription", subscriptionId)
          .AddParameter("Credential", credential);

        var results = ps.Invoke();

        // Process results
    }

    // Additional code here

    // Much more elegant and clear what is being done at a glance
    using (var ps = PowerShell.Create(psRunspace))
    {
        ps.AddCommand("Get-AzureRMVM")
          .AddParameter("ResourceGroupName", resourceGroupName)
          .AddParameter("Name", vmName);

        var results = ps.Invoke();

        // Work with VM
    }
}