Path to publish: $(Build.ArtifactStagingDirectory)
Artifact name: drop
Artifact type: Server
Queue and test the build
Save and queue the build. Once the build is done, click Artifacts and then Explore to see the .DLL file produced by the build.
Define a deployment build
Now define a build you can use to deploy to Azure. This definition uses the Visual Studio Build step, which enables you to later add UI test and database projects, and also to build everything with a single task.