Sharing code across Azure functions using class libraries

Let's say that we have developed a common library across various applications being used in our project, such as a web app or a Windows Presentation Foundation (WPF) application, and now we would like to re-use some functionality in an Azure function app. It's definitely possible to re-use it. In this recipe, we'll develop and create a new .dll file and we'll learn how to use the classes and their methods in Azure functions.

How to do it…

Let's create a class library by performing the following steps:

1. Create a new Class Library application using Visual Studio as shown in Figure 10.7:
   

   Figure 10.7: Visual Studio—creating a class library project

2. Create a new class named Helper and paste the following code in the new class file:

   namespace Utilities
   {
       public class Helper
       {
         public static string...