如何在TypeScript中新建一个类

I'm new to TypeScript, but experienced in C#. I'm trying to do something very simple, and I'm missing something fundamental. I'm using Protractor to write User Tests on an Angular front-end. I'm using the Page Object pattern, and I want to keep the Page Object in a separate file from my user tests so I can share the Page Object among several user test files.I'm new to TypeScript, but experienced in C#. I