C#

string someText = yourTextBox.Text;
TreeNode aNode = new TreeNode();
   aNode.Name = "some name here";
   aNode.Text = someText;
   yourTreeCtrl.Nodes.Add(aNode);

[XmlRoot("Clean")]
public class LookupItemList ...

<br />
            XmlSerializerNamespaces ns = new XmlSerializerNamespaces();<br />
            ns.Add("", "");<br />
<br />
            XmlSerializer s = new XmlSerializer(typeof(LookupItem));<br />
<br />
            XmlWriterSettings settings = new XmlWriterSettings();<br />
            settings.OmitXmlDeclaration = true;<br />
<br />
            StringWriter output = new StringWriter();<br />
            XmlWriter writer = XmlWriter.Create(output, settings);<br />
<br />
            //TextWriter w = new StreamWriter();<br />
            s.Serialize(writer, toSerialize, ns);<br />
            writer.Close();<br />
<br />
            return output.ToString();<br />

[XmlElement("Item")]
public class LookupItem ...

[XmlType(TypeName = "Item")]
public class LookupItem {
    // TODO
}
 
[XmlRoot("Clean")]
public class LookupItemList : List<LookupItem> {
    // TODO
}

using System.Diagnostics;
 
ProcessStartInfo PSItest= new ProcessStartInfo();
PSItest.FileName = @"???";
PSItest.Arguments = "oneargument";
//or
PSItest.Arguments = "firstargument secondargument";
using(Process Ptest = Process.Start(PSItest))
{
}

public static void Main(string[] Args)
{
    string arg1 = "";
    string arg2 = "";

    if (Args.Length > 0)
    {
        arg1 = Args[0];
    }
    if (Args.Length > 1)
    {
        arg2 = Args[1];
    }
}