C#

listView1.KeyUp += new KeyEventHandler(OnKeyUp);
// ...
private void OnKeyUp(object sender, KeyEventArgs e)
{
  if (e.Control)
  {
    if (e.KeyCode == Keys.C) Copy();
    else if (e.KeyCode == Keys.P) Paste();
  }
}

public void Copy()
{
  DataObject do = new DataObject("ListViewItems", listView1.SelectedItems);
  Clipboard.SetDataObject(do, false);
}

public void Paste()
{
  IDataObject do = Clipboard.GetDataObject();
  if (do != null)
  {
    IEnumerable items = (IEnumerable)do.GetData("ListViewItems");
    if (items != null)
      foreach (ListViewItem item in items)
        listView1.Items.Add(item);
  }
}

<configuration>
  <configSections>
    <section name="mysettings"
      type="System.Configuration.NameValueSectionHandler, System" />
  </configSections>
  <mysettings>
    <add key="opt1" value="myvalue" />
    <add key="opt2" value="somevalue" />
  </mysettings>
</configuration>

using System;
using System.Configuration;
 
class Test
{
  static void Main()
  {
    NameValueCollection settings = ConfigurationSettings.GetConfig("mysettings");
    foreach (DictionaryEntry setting in settings)
      Console.WriteLine("{0} = {1}", setting.Key, setting.Value);
  }
}

<configuration>
  <configSections>
    <sectionGroup name="mycompany">
      <section name="securityInfo" type="System.Configuration.NameValueSectionHandler, System" />
      <section name="licenseInfo" type="System.Configuration.NameValueSectionHandler, System" />
    </sectionGroup>
  </configSections>
  <!-- other stuff -->
  <mycompany>
    <securityInfo>...</securityInfo>
    <licenseInfo>...</licenseInfo>
  </mycompany>
</configuration>