To show a linear or a 2D barcode in your application you should simply create a barcode control, set its properties and place it somewhere in you application. The following code demonstrates how to create and initialize an EAN13 linear barcode and place it in a form:

NLinearBarcode barcode = new NLinearBarcode();
barcode.Symbology = ENLinearBarcodeSymbology.EAN13;
barcode.Text = "0123456789012";
barcode.AutoSize = true;
barcode.Location = new Point(10, 10);

this.Controls.Add(barcode);

This code results in the following barcode:

Nevron .NET Vision's barcode library lets you easily create barcode images by using the proper barcode painter class. For example the code below creates a 2D barcode image by the QR code standard:

NMatrixBarcodePainter painter = new NMatrixBarcodePainter();
painter.Symbology = ENMatrixBarcodeSymbology.QrCode;
painter.Text = "https://www.nevron.com";
Bitmap bitmap = painter.CreateRaster(100, 100, 96);

This code results in the following QR code image: