ATMLCommonLibrary.controls.ATMLPreviewPanel.UnloadPreview C# (CSharp) Method

        public void UnloadPreview()
        {
            if (_officePreviewInstance != null)
            {
                ( (IPreviewHandler) _officePreviewInstance ).Unload();
                Marshal.FinalReleaseComObject( _officePreviewInstance );
                _officePreviewInstance = null;
                GC.Collect();
            }
        }