Hi Mahesh,
Thank you for contacting support. Aspose.BarCode API allows developers to quickly and easily add bar code generation / recognition functionality to their applications. You can repeat bar code generation / recognition process. Based on your query, yes, you are right that the user is adding Aspose.BarCode.WPF library in his sample project.
In addition to that, there are some evaluation limitations. You can evaluate Aspose.BarCode API with full features support. You can avoid evaluation limitations by getting a temporary license for 30 days and try the latest version at your end.
Please refer to the download page here:
You can learn all about how Aspose API’s are licensed by checking out the Licenses FAQ here: http://www.aspose.com/corporate/purchase/faqs/default.aspx
Please do let us know in case of further assistance and questions.