C#

private static readonly Task CompletedTask = Task.FromResult(true);

private IEnumerable<Func<Task>> GetAlarmInvocationList()
{
    lock (this)
    {
        Func<Task> handler = eAlarmReceived;
        if (handler == null) return null;
        return handler.GetInvocationList().Cast<Func<Task>>().ToList();
    }
}

internal Task OnAlarm()
{
    var eTasks = GetAlarmInvocationList();
    if (eTasks == null) return CompletedTask;
    
    var tasks = eTasks.Select(fn => fn());
    return Task.WhenAll(tasks);
}

var eTasks = handler?.GetInvocationList()?.Cast<Func<Task>>()?.ToList();
if (eTask == null)
  return;
foreach (var t in eTask)
  await t();

Quote:

- The term 'Import-Module' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. - System.Management.Automation - at System.Management.Automation.PowerShell.CoreInvoke[TOutput](IEnumerable input, PSDataCollection`1 output, PSInvocationSettings settings) at System.Management.Automation.PowerShell.Invoke(IEnumerable input, PSInvocationSettings settings) at System.Management.Automation.PowerShell.Invoke(IEnumerable input) at System.Management.Automation.RemotePipeline.Invoke(IEnumerable input) at System.Management.Automation.Runspaces.Pipeline.Invoke() at exchangePictureUpdater.exchangePictureUpdater.btnAddReplace_Click(Object sender, EventArgs e) - Void CoreInvoke[TOutput](System.Collections.IEnumerable, System.Management.Automation.PSDataCollection`1[TOutput], System.Management.Automation.PSInvocationSettings) |

Command command1 = new Command("set-adserversettings");
CommandParameter parameter1 = new CommandParameter("viewentireforest", true);
command1.Parameters.Add(parameter1);

Command command2 = new Command("set-userphoto");
CommandParameter parameter2a = new CommandParameter("identity", tbxName.Text);
CommandParameter parameter2b = new CommandParameter("picturedata", displayedImage);
CommandParameter parameter2c = new CommandParameter("domaincontroller", "adfadfadf.com");
CommandParameter parameter2d = new CommandParameter("confirm", false);
command2.Parameters.Add(parameter2a);
command2.Parameters.Add(parameter2b);
command2.Parameters.Add(parameter2c);
command2.Parameters.Add(parameter2d);

Pipeline pipeline = runspacee.CreatePipeline();

pipeline.Commands.Add(command1);
pipeline.Commands.Add(command2);

string scriptText = @"$pw = convertto-securestring -AsPlainText -Force -String '<password>'; $cred = new-object -typename System.Management.Automation.PSCredential -argumentlist '<domain>\<username>', $pw;  $session = new-pssession -ConfigurationName Microsoft.Exchange -ConnectionUri '<server url>/powershell' -credential $cred; import-pssession $session; Set-ExecutionPolicy bypass -confirm:$false -force; $pic = ([System.IO.File]::ReadAllBytes('" + <picture file name> + "')); set-userphoto -identity <username> -picturedata $pic -domaincontroller '<dc fqdn>' -confirm:$false;";

               
                runExchangeShellScript(scriptText);

private string runExchangeShellScript(string scriptText)
        {
            
            Runspace runspace = RunspaceFactory.CreateRunspace();

            // open it
            runspace.Open();

            // create a pipeline and feed it the script text
            Pipeline pipeline = runspace.CreatePipeline();
            pipeline.Commands.AddScript(scriptText);
            RunspaceInvoke runSpaceInvoker = new RunspaceInvoke(runspace);
            runSpaceInvoker.Invoke("Set-ExecutionPolicy Unrestricted");

            // add an extra command to transform the script output objects into nicely formatted strings
            // remove this line to get the actual objects that the script returns. For example, the script
            // "Get-Process" returns a collection of System.Diagnostics.Process instances.
            //pipeline.Commands.Add("Out-String");

            // execute the script
            Collection<PSObject> results = null;
            try
            {
                results = pipeline.Invoke();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.InnerException + " - " + ex.Message + " - " + ex.Source + " - " + ex.StackTrace + " - " + ex.TargetSite + " - " + ex.Data);
                return "";
            }


            // close the runspace
            runspace.Close();

            // convert the script result into a single string
            StringBuilder stringBuilder = new StringBuilder();
            foreach (PSObject obj in results)
            {
                stringBuilder.AppendLine(obj.ToString());
            }

            // return the results of the script that has
            // now been converted to text
            return stringBuilder.ToString();
        }

private void LoadFileNames(string folder, string extension, ListBox lb)
    {
    string[] files = Directory.GetFiles(folder, "*" + extension);
    lb.DataSource = files.Select(f => Path.GetFileNameWithoutExtension(f)).ToList();
    }

LoadFileNames(@"D:\Temp", ".txt", myListBox);

string greetings = "Hello!";
private void MyMethod(greetings g)
   {

string greetings = "Hello!";
private void MyMethod(string g)
   {
   ...
   }
   ...
   MyMethod(greetings);

using System.Windows.Forms;

<MenuItem ContextMenu="{StaticResource MyContextMenu}">
    <MenuItem/>
    <MenuItem/>
    <MenuItem/>
</MenuItem>