New Azure WebJob Project - JobHostConfiguration/RunAndBlock missing after NuGet updates


Easy Replication

  1. Create a new project 'ASP.NET Web Application (.NET Framework).
  2. Build compile, update NuGet, all works.
  3. Add: Add New Azure WebJob Project.
  4. Build, compile. Happy
  5. Update NuGet for the WebJob project.
  6. Project no longer compiles.

Breaking changes were introduced

So I install


This resolves QueueTriggerAttribute

But in program.cs

    static void Main()
        var config = new JobHostConfiguration();

        if (config.IsDevelopment)

        var host = new JobHost(config);

I am encountering the following problems:

  1. JobHostConfiguration is now missing.
  2. JobHost constructor now has two parameters, including a new IJobHostContextFactory?
  3. RunAndBlock is missing. It is now 'StartAsync'
  4. The code now needs to become asynchronous since there are no synchronous calls to the job.


  1. What additioanl assemblies need to be installed?
  2. What is this new JobHostContextFactory?
  3. How do I configure the job now?
  4. How should I update the code for asynchronous?
  5. How do I block for a continuous job now that all we have is Start?

Thanks in advance!

  • C#
  • .Net Framework 4.6.2
  • Visual Studio 2017 - v15.8.7

The 3.0.0 NuGet package update (non-beta) brought breaking changes. It's based on the generic host which is similar to the host. Here's an example of the new setup

Here you can find a GitHub discussion related to that topic.