diff --git a/SampleUserControlLibrary/SampleUserControl.xaml.cs b/SampleUserControlLibrary/SampleUserControl.xaml.cs
index 15a8e4c..f580b73 100644
--- a/SampleUserControlLibrary/SampleUserControl.xaml.cs
+++ b/SampleUserControlLibrary/SampleUserControl.xaml.cs
@@ -98,6 +98,12 @@ public string SubscriptionKey
             set;
         }
 
+        public string AzureEnvironment
+        {
+            get;
+            set;
+        }
+
         public SampleScenarios()
         {
             InitializeComponent();
diff --git a/SampleUserControlLibrary/SubscriptionKeyPage.xaml b/SampleUserControlLibrary/SubscriptionKeyPage.xaml
index ff16284..d7f815a 100644
--- a/SampleUserControlLibrary/SubscriptionKeyPage.xaml
+++ b/SampleUserControlLibrary/SubscriptionKeyPage.xaml
@@ -39,6 +39,11 @@
                 <Button Click="SaveKey_Click" Margin="5, 0, 0, 0" Padding="5, 0, 5, 0" VerticalAlignment="Center" >Save Key</Button>
                 <Button Click="DeleteKey_Click" Margin="5, 0, 0, 0" Padding="5, 0, 5, 0" VerticalAlignment="Center" >Delete Key</Button>
             </StackPanel>
+            <StackPanel Orientation="Horizontal" HorizontalAlignment="Left" VerticalAlignment="Top">
+                <Label VerticalAlignment="Center">Azure Environment:</Label>
+                <RadioButton GroupName="Environment" Margin="5, 0, 0, 0" Padding="5, 0, 5, 0" VerticalAlignment="Center" IsChecked="True" Checked="RadioButton_Checked">Global Azure</RadioButton>
+                <RadioButton GroupName="Environment" Margin="5, 0, 0, 0" Padding="5, 0, 5, 0" VerticalAlignment="Center" Checked="RadioButton_Checked">Mooncake - China Azure</RadioButton>
+            </StackPanel>
         </StackPanel>
     </Grid>
 </Page>
diff --git a/SampleUserControlLibrary/SubscriptionKeyPage.xaml.cs b/SampleUserControlLibrary/SubscriptionKeyPage.xaml.cs
index 5ed6eb5..cabd12e 100644
--- a/SampleUserControlLibrary/SubscriptionKeyPage.xaml.cs
+++ b/SampleUserControlLibrary/SubscriptionKeyPage.xaml.cs
@@ -49,6 +49,7 @@ public partial class SubscriptionKeyPage : Page, INotifyPropertyChanged
         private readonly string _defaultSubscriptionKeyPromptMessage = "Paste your subscription key here to start";
 
         private static string s_subscriptionKey;
+        private static string s_environment;
 
         private SampleScenarios _sampleScenarios;
         public SubscriptionKeyPage(SampleScenarios sampleScenarios)
@@ -78,6 +79,23 @@ public string SubscriptionKey
             }
         }
 
+        /// <summary>
+        /// Get or sets Azure Environment
+        /// </summary>
+        public string AzureEnvironment
+        {
+            get
+            {
+                return s_environment;
+            }
+
+            set
+            {
+                s_environment = value;
+                _sampleScenarios.AzureEnvironment = s_environment;
+            }
+        }
+
         /// <summary>
         /// Implement INotifyPropertyChanged interface
         /// </summary>
@@ -186,5 +204,16 @@ private void GetKeyButton_Click(object sender, RoutedEventArgs e)
         {
             System.Diagnostics.Process.Start("https://www.microsoft.com/cognitive-services/en-us/sign-up");
         }
+
+        private void RadioButton_Checked(object sender, RoutedEventArgs e)
+        {
+            var button = sender as RadioButton;
+
+            if (button.Content != null)
+            {
+                // s_environment = button.Content.ToString().ToLower();
+                AzureEnvironment = button.Content.ToString().ToLower();
+            }
+        }
     }
 }