- C#, vb.net, Windows Form, Console , WPF, XAML, .NET 2.0-4.5, Visual Studio 2010/ 2012 / 2013/ 2015 - SQL Server, MySQL, Oracle, database design, database development, database administration, SQL Scripting - ADO.NET, Entity Framework, MVC - LINQ, WCF, XML, JSON, SOAP, REST, HTTP request, Web API - Async process, background worker, Reflection - Socket/serial/COM port communication - DevExpress, Crystal Report, Newtonsoft, NLog - Windows services, web services, API Integration - Aspose, iTextSharp - Selenium, browser automation, web scraper - MSI Installer - TFS, SVN, VSS -- Zapier Triggers - Quickbooks/Quickbooks POS, GreetBits, Shopify API, nopcommerce - Office tool and Outlook Sync