diff --git a/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/Subnet.java b/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/Subnet.java
index a2404bf41bc0..678af7e3815c 100644
--- a/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/Subnet.java
+++ b/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/Subnet.java
@@ -5,6 +5,7 @@
  */
 package com.microsoft.azure.management.network;
 
+import java.util.Collection;
 import java.util.Set;
 
 import com.microsoft.azure.management.apigeneration.Beta;
@@ -42,7 +43,7 @@ public interface Subnet extends
      * Note that this call may result in multiple calls to Azure to fetch all the referenced interfaces each time it is invoked.
      */
     @Method
-    Set<NicIPConfiguration> listNetworkInterfaceIPConfigurations();
+    Collection<NicIPConfiguration> listNetworkInterfaceIPConfigurations();
 
     /**
      * @return available private IP addresses within this network
diff --git a/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/implementation/SubnetImpl.java b/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/implementation/SubnetImpl.java
index 56f150065963..b87a831b4347 100644
--- a/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/implementation/SubnetImpl.java
+++ b/azure-mgmt-network/src/main/java/com/microsoft/azure/management/network/implementation/SubnetImpl.java
@@ -5,12 +5,13 @@
  */
 package com.microsoft.azure.management.network.implementation;
 
+import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.TreeMap;
 import java.util.TreeSet;
 
 import com.microsoft.azure.SubResource;
@@ -140,13 +141,13 @@ public NetworkSecurityGroup getNetworkSecurityGroup() {
 
     @Override
     public Set<NicIPConfiguration> getNetworkInterfaceIPConfigurations() {
-        return listNetworkInterfaceIPConfigurations();
+        return Collections.unmodifiableSet(new TreeSet<NicIPConfiguration>(listNetworkInterfaceIPConfigurations()));
     }
 
     @Override
-    public Set<NicIPConfiguration> listNetworkInterfaceIPConfigurations() {
-        Set<NicIPConfiguration> ipConfigs = new HashSet<>();
-        Map<String, NetworkInterface> nics = new HashMap<>();
+    public Collection<NicIPConfiguration> listNetworkInterfaceIPConfigurations() {
+        Collection<NicIPConfiguration> ipConfigs = new ArrayList<>();
+        Map<String, NetworkInterface> nics = new TreeMap<>();
         List<IPConfigurationInner> ipConfigRefs = this.inner().ipConfigurations();
         if (ipConfigRefs == null) {
             return ipConfigs;
@@ -180,7 +181,7 @@ public Set<NicIPConfiguration> listNetworkInterfaceIPConfigurations() {
             ipConfigs.add(ipConfig);
         }
 
-        return Collections.unmodifiableSet(ipConfigs);
+        return Collections.unmodifiableCollection(ipConfigs);
     }
 
     @Override
diff --git a/azure/src/test/java/com/microsoft/azure/management/TestNetworkInterface.java b/azure/src/test/java/com/microsoft/azure/management/TestNetworkInterface.java
index d089984cc37a..ac5bba655355 100644
--- a/azure/src/test/java/com/microsoft/azure/management/TestNetworkInterface.java
+++ b/azure/src/test/java/com/microsoft/azure/management/TestNetworkInterface.java
@@ -5,8 +5,8 @@
  */
 package com.microsoft.azure.management;
 
+import java.util.Collection;
 import java.util.List;
-import java.util.Set;
 
 import org.junit.Assert;
 
@@ -58,7 +58,7 @@ public NetworkInterface createResource(NetworkInterfaces networkInterfaces) thro
         Subnet subnet = network.subnets().get(ipConfig.subnetName());
         Assert.assertNotNull(subnet);
         Assert.assertEquals(1, subnet.networkInterfaceIPConfigurationCount());
-        Set<NicIPConfiguration> ipConfigs = subnet.listNetworkInterfaceIPConfigurations();
+        Collection<NicIPConfiguration> ipConfigs = subnet.listNetworkInterfaceIPConfigurations();
         Assert.assertNotNull(ipConfigs);
         Assert.assertEquals(1, ipConfigs.size());
         NicIPConfiguration ipConfig2 = null;