[Fluent Compute] Create resource in multiple step

I am trying to create virtual machines using the fluent api but there are conditions that will affect the creation.

For example, in some cases i might want to enable boot diagnostics and some others i don’t.

How can i do this in stages for ex:

var vm = azure.VirtualMachines
    .Define(vm.Name)
    .WithRegion(vm.ArmResource.Inner.Location)
    .WithExistingResourceGroup(tmpRg)
    .WithExistingPrimaryNetworkInterface(primaryNic)
    .WithSpecializedOSDisk(osDisk, (OperatingSystemTypes)osType);

if(bootdiag)
    vm = vm.WithBootDiagnostics();

[jsquire]

Thank you for your feedback. Tagging and routing to the team member best able to assist.

[toutougabi]

I answered my answer, i was able to use the iwithcreate and the managed version in multiple steps with success, i think what confused me is that the changes are not stored in the main variable but in private properties.