Reuse view logic with injectable services

- [Instructor] By this point in the course, … I've shown you several different HTML helper methods … and you've accessed these helpers … from the special HTML and URL properties in the view … and trust me, the more you use asp.net Core MVC, … the more you're going to want to create your own helpers … and custom properties and in this video, … that's exactly what I'm going to show you how to do. … For a good example of the need for a custom helper method, … take a look at how we're rendering the posted date property. … When we leave it up to razor to render it, … it ends up displaying some long string with a time … including seconds and everything. … But what if we only wanted to display the date? … We could change the code in this one place … to make that happen and that's all well and good, … but what if we applied this approach … all over our application … and then we wanted to change the way … that we displayed all of our dates, … wherever they're rendered? … Well, then we'd have to search for all those references …