public async Task GetDescendants()
{
ManagementGroup mgmtGroup = await Client.GetManagementGroupOperations(_mgmtGroup.Id).GetAsync();
DescendantInfo descendant = null;
await foreach (var desc in mgmtGroup.ListDescendantsAsync())
{
descendant = desc;
break;
}
Assert.IsNull(descendant); //should have no descendants
}