Peter O'Hanlon has been a professional developer for nearly 30 years. In this time, he has developed applications of all types and sizes. During his career, Peter worked with languages such as C, C++, Basic, Pascal , and JavaScript. In the last 19 years, Peter has concentrated on C#, WPF, ASP.NET, JavaScript , and now TypeScript. Over the years, Peter has been a Code Project MVP several times, a member of the Intel Innovator program, as well as competing in the Intel Ultimate Coder 2 contest. Peter is keen to embrace new technologies and languages; is the author of the Packt Publishing book, Advanced TypeScript Programming Projects and is currently writing his second book on TypeScript.