In the modern age, software solutions can span across many platforms. One monster solution alone could contain a range of web projects, web services, desktop applications and mobile applications. If you’ve ever written a class library for .Net Framework and later had to target Mono to use it with iOS, you might want to save yourself from the trouble in the future. You might also be one of the lucky few who have worked with PCLs (Portable Class Libraries) and had the pleasure of dealing with those cumbersome PCL profiles. Well no more! PCL is dead, and long live the new King: .Net Standard!