C# .NET Core Code 39 Generator Library SDK

   using System;
   using System.Collections.Generic;
   using System.Text;
   using OnBarcode.Barcode;
   using System.Drawing.Imaging;
   using System.Drawing;


   Linear code39 = new Linear();

   // Barcode data to encode
   code39.Data = "ONBARCODE";
   // Barcode symbology type
   code39.Type = BarcodeType.CODE39;
   // Apply checksum digit for Code-39
   code39.AddCheckSum = true;

   // The space between 2 characters in code 39; This a multiple of X; The default is 1.
   code39.I = 1.0f;
   // Wide/narrow ratio, 2.0 - 3.0 inclusive, default is 2.
   code39.N = 2.0f;
   // If true, display a * in the beginning and end of barcode text
   code39.ShowStartStopInText = false;

   /*
   * Barcode Image Related Settings
   */
   // Unit of meature for all size related setting in the library. 
   code39.UOM = UnitOfMeasure.PIXEL;
   // Bar module width (X), default is 1 pixel;
   code39.X = 1;
   // Bar module height (Y), default is 60 pixel;
   code39.Y = 60;
   // Barcode image left, right, top, bottom margins. Defaults are 0.
   code39.LeftMargin = 0;
   code39.RightMargin = 0;
   code39.TopMargin = 0;
   code39.BottomMargin = 0;
   // Image resolution in dpi, default is 72 dpi.
   code39.Resolution = 72;
   // Created barcode orientation.
   //4 options are: facing left, facing right, facing bottom, and facing top
   code39.Rotate = Rotate.Rotate0;

   /*
   * Linear barcodes human readable text styles
   */
   // Display human readable text under the barcode
   code39.ShowText = true;
   // Display checksum digit at the end of barcode data.
   code39.ShowCheckSumChar = true;
   // Human readable text font size, font family and style
   code39.TextFont = new Font("Arial", 9f, FontStyle.Regular);
   // Space between barcode and text. Default is 6 pixel.
   code39.TextMargin = 6;

   // Generate Code-39 and encode barcode to gif format
   code39.Format = System.Drawing.Imaging.ImageFormat.Gif;
   code39.drawBarcode("C:\\code39.gif");

   /*
   You can also call other drawing methods to generate barcodes
    
   public void drawBarcode(Graphics graphics);
   
   public void drawBarcode(string filename);
   
   public Bitmap drawBarcode();
   
   public void drawBarcode(Stream stream);
   
   */