public async Task PlacementGroupId()
        {
            var             asetName = Recording.GenerateAssetName("aset-");
            AvailabilitySet aset     = await CreateAvailabilitySetAsync(asetName);

            var beforeAdd = aset.Data.ProximityPlacementGroupId;

            ResourceGroup           rg          = Client.GetResourceGroup(ResourceGroup.CreateResourceIdentifier(aset.Id.SubscriptionId, aset.Id.ResourceGroupName));
            var                     proxGrpName = Recording.GenerateAssetName("proxGrp-");
            ProximityPlacementGroup proxGrp     = (await rg.GetProximityPlacementGroups().CreateOrUpdateAsync(true, proxGrpName, new ProximityPlacementGroupData(DefaultLocation))).Value;

            AvailabilitySetUpdateOptions updateOptions = new AvailabilitySetUpdateOptions();

            updateOptions.ProximityPlacementGroupId = proxGrp.Id;
            aset = await aset.UpdateAsync(updateOptions);

            var addIdResult = aset.Data.ProximityPlacementGroupId;

            updateOptions.ProximityPlacementGroupId = null;
            aset = await aset.UpdateAsync(updateOptions);

            var removeIdResult = aset.Data.ProximityPlacementGroupId;

            var             asetName2 = Recording.GenerateAssetName("aset-");
            AvailabilitySet aset2     = await CreateAvailabilitySetAsync(asetName2);

            var newBeforeAdd = aset2.Data.ProximityPlacementGroup?.Id;

            AvailabilitySetUpdateOptions updateOptions2 = new AvailabilitySetUpdateOptions();

            updateOptions2.ProximityPlacementGroup    = new Resources.Models.WritableSubResource();
            updateOptions2.ProximityPlacementGroup.Id = proxGrp.Id;
            aset2 = await aset2.UpdateAsync(updateOptions2);

            var newAddIdResult = aset2.Data.ProximityPlacementGroup.Id;

            updateOptions2.ProximityPlacementGroup.Id = null;
            aset2 = await aset2.UpdateAsync(updateOptions2);

            var newRemoveIdResult = aset2.Data.ProximityPlacementGroup?.Id;

            updateOptions2.ProximityPlacementGroup.Id = proxGrp.Id;
            aset2 = await aset2.UpdateAsync(updateOptions2);

            Assert.NotNull(aset2.Data.ProximityPlacementGroup.Id);

            updateOptions2.ProximityPlacementGroup = null;
            aset2 = await aset2.UpdateAsync(updateOptions2);

            var newRemoveOuterIdResult = aset2.Data.ProximityPlacementGroup?.Id;

            Assert.AreEqual(beforeAdd, newBeforeAdd);
            Assert.AreEqual(addIdResult, newAddIdResult);
            Assert.AreEqual(removeIdResult, newRemoveIdResult);
            Assert.AreEqual(removeIdResult, newRemoveOuterIdResult);
        }