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'System.AccessViolationException' occurred in System.Windows.Forms.dll immediately before entering

Posted By:      Posted Date: October 20, 2010    Points: 0   Category :Windows Application
 

<p>Win7 64 bit; fully patched VS2008 targeting FW2.0; VB.Net; running in Debug Mode (not tested in Release mode)</p>
<p>I have a resonably complex app which I am refactoring a bit. As part of that, I relocated some code from a subroutine into&nbsp;a Click Event Handler. The Event Handler will, late in the handler, call the, reduced in function, subroutine. The point of this is that all changes to the code occur in the Event Handler and the routine it calls. Simple right?</p>
<p>Now when I click the button associated with the modified Handler I get:</p>

<p>A first chance exception of type 'System.AccessViolationException' occurred in System.Windows.Forms.dll<br />With Error System.AccessViolationException Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</p>
<p>at MusicManager2009.frmMain2.cmdLoadAlbum_Click(Object sender, EventArgs e)</p>
<p>at System.Windows.Forms.Control.OnClick(EventArgs e)</p>
<p>at System.Windows.Forms.Button.OnClick(EventArgs e)</p>
<p>at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)</p>
<p>at System.Windows.Forms.Control.WmMouseUp(Message&amp; m, MouseButtons button, Int32 clicks)</p>
<p>at System.Windows.For


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