Cannot set Visibility or call Show, ShowDialog, Close, or Hide while window is closing. in WPF

Cannot set Visibility or call Show, ShowDialog, Close, or Hide while
window is closing. in WPF

I am working with wpf-C#, I am facing an issue : that is - on window
closing, visibility is set to hidden and e.Cancel to true. It is working
as expected in Windows 7. But when I tested it with Windows Server 2003
SP2 ,.Net framework 3.5, It is not working as expected.That means, It
hides from the user but when I tried to show on next time it shows the
error- Cannot set Visibility or call Show, ShowDialog, Close, or Hide
while window is closing. It happens only in Windows server 2003. But in
Windows 7 it works fine.
The piece of code is like this:
private void OnClosing( object sender,
System.ComponentModel.CancelEventArgs e )
{
try
{
this.Visibility = Visibility.Hidden;
e.Cancel = true;
this.ShowInTaskbar = false;
}
catch (Exception ex)
{
NeMIASMessageBox.ShowInformationMessageBox(ex.Message);
}
}