public void WriteData_Test() { IStreamFilter[] filters = _usefilters; PDFIndirectObject indobj = new PDFIndirectObject(this); PDFStream stream = new StreamProxy(filters, indobj); PDFWriter writer = null; try { stream.WriteData(writer); Assert.Fail("Expected an exception to be raised for PDFStream.WriteData()"); } catch (NotSupportedException) { //Should raise an exception } stream.Dispose(); indobj.Dispose(); }