/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.Form.FormClosing" /> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.FormClosingEventArgs" /> that contains the event data.</param>
protected override void OnFormClosing(FormClosingEventArgs e)
{
base.OnFormClosing(e);
GorgonApplication.IdleMethod = null;
_sobel?.Dispose();
_sobelShader?.Dispose();
_outputTexture?.Dispose();
_sourceTexture?.Texture?.Dispose();
_renderer?.Dispose();
_graphics?.Dispose();
}