I found ghostscript little confusing. But, I found the solution from here
string inputFile = @"E:\gss_test\test_postscript.ps"; GhostscriptPipedOutput gsPipedOutput = new GhostscriptPipedOutput(); // pipe handle format: %handle%hexvalue string outputPipeHandle = "%handle%"+ int.Parse(gsPipedOutput.ClientHandle).ToString("X2"); using (GhostscriptProcessor processor = new GhostscriptProcessor()) { List<string> switches = new List<string>(); switches.Add("-empty"); switches.Add("-dQUIET"); switches.Add("-dSAFER"); switches.Add("-dBATCH"); switches.Add("-dNOPAUSE"); switches.Add("-dNOPROMPT"); switches.Add("-sDEVICE=pdfwrite"); switches.Add("-o"+ outputPipeHandle); switches.Add("-q"); switches.Add("-f"); switches.Add(inputFile); try { processor.StartProcessing(switches.ToArray(), null); byte[] rawDocumentData = gsPipedOutput.Data; //if (writeToDatabase) //{ // Database.ExecSP("add_document", rawDocumentData); //} //else if (writeToDisk) //{ // File.WriteAllBytes(@"E:\gss_test\output\test_piped_output.pdf", rawDocumentData); //} } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { gsPipedOutput.Dispose(); gsPipedOutput = null; } }This reads the postscript files easily :)