WPF

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:settings="clr-namespace:YourNameSpace.Properties">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary>
            <settings:Settings x:Key="settings" />
        </ResourceDictionary>
    </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

<ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="SettingsResources.xaml"/>
</ResourceDictionary.MergedDictionaries>

private void Window_Closed(object sender, EventArgs e)
{
    //Stores all user settings (see XAML for bindings)
    Settings.Default.Save();
}

Jammer

Going where everyone here has gone before!
My Blog

Pete O'Hanlon wrote:

It'll be the same behaviour as with a Windows Forms app.

Pete O'Hanlon wrote:

It sounds like you are performing the copy on the primary thread, which blocks the UI until it completes the operation.

public class RecordUtil
{

  public IntPtr _IntPtr;

  public RecordUtil(IntPtr iptr)
  {
     _IntPtr=iptr; //IntPtr.Zero
   }
}

{
  IntPtr source = new WindowInteropHelper(this).Handle;
  recorder = new RecordUtil(source); //RecordUtil constructor overloading

}