AutoCAD .NET :: Convert DWG To BMP In 2013

I want to convert the .dwg file to .bmp in AutoCAD 2013 using interop services in API

I have a code to perform this in AutoCAD 2012 but that is not working fine in AutoCAD 2013.

 This is what i tried

AcadSelectionSet oSS = null;
short[] ftype = new short[1];
ftype[0] = 410;
object[] fdata = new object[1];
fdata[0] = "Model";
acadapp.ZoomExtents();
oSS = _acadapp.ActiveDocument.SelectionSets.Add("MySet");
oSS.Select(AcSelect.acSelectionSetAll, null, null, ftype, fdata);
acadapp.ActiveDocument.Export(OutputFileName, "BMP", oSS);