diff --git a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/AppsOperations.cs b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/AppsOperations.cs
index e4f13f598650..a383c6326dad 100644
--- a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/AppsOperations.cs
+++ b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/AppsOperations.cs
@@ -82,6 +82,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<App>> GetWithHttpMessagesAsync(string resourceGroupName, string resourceName, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -94,7 +98,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "resourceName");
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -102,7 +105,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("resourceGroupName", resourceGroupName);
                 tracingParameters.Add("resourceName", resourceName);
                 tracingParameters.Add("cancellationToken", cancellationToken);
@@ -115,9 +117,9 @@ internal AppsOperations(IotCentralClient client)
             _url = _url.Replace("{resourceGroupName}", System.Uri.EscapeDataString(resourceGroupName));
             _url = _url.Replace("{resourceName}", System.Uri.EscapeDataString(resourceName));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -345,11 +347,14 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<IPage<App>>> ListBySubscriptionWithHttpMessagesAsync(Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -357,7 +362,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("cancellationToken", cancellationToken);
                 ServiceClientTracing.Enter(_invocationId, this, "ListBySubscription", tracingParameters);
             }
@@ -366,9 +370,9 @@ internal AppsOperations(IotCentralClient client)
             var _url = new System.Uri(new System.Uri(_baseUrl + (_baseUrl.EndsWith("/") ? "" : "/")), "subscriptions/{subscriptionId}/providers/Microsoft.IoTCentral/IoTApps").ToString();
             _url = _url.Replace("{subscriptionId}", System.Uri.EscapeDataString(Client.SubscriptionId));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -524,6 +528,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<IPage<App>>> ListByResourceGroupWithHttpMessagesAsync(string resourceGroupName, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -532,7 +540,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "resourceGroupName");
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -540,7 +547,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("resourceGroupName", resourceGroupName);
                 tracingParameters.Add("cancellationToken", cancellationToken);
                 ServiceClientTracing.Enter(_invocationId, this, "ListByResourceGroup", tracingParameters);
@@ -551,9 +557,9 @@ internal AppsOperations(IotCentralClient client)
             _url = _url.Replace("{subscriptionId}", System.Uri.EscapeDataString(Client.SubscriptionId));
             _url = _url.Replace("{resourceGroupName}", System.Uri.EscapeDataString(resourceGroupName));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -710,6 +716,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<AppAvailabilityInfo>> CheckNameAvailabilityWithHttpMessagesAsync(OperationInputs operationInputs, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -722,7 +732,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 operationInputs.Validate();
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -730,7 +739,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("operationInputs", operationInputs);
                 tracingParameters.Add("cancellationToken", cancellationToken);
                 ServiceClientTracing.Enter(_invocationId, this, "CheckNameAvailability", tracingParameters);
@@ -740,9 +748,9 @@ internal AppsOperations(IotCentralClient client)
             var _url = new System.Uri(new System.Uri(_baseUrl + (_baseUrl.EndsWith("/") ? "" : "/")), "subscriptions/{subscriptionId}/providers/Microsoft.IoTCentral/checkNameAvailability").ToString();
             _url = _url.Replace("{subscriptionId}", System.Uri.EscapeDataString(Client.SubscriptionId));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -905,6 +913,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<AppAvailabilityInfo>> CheckSubdomainAvailabilityWithHttpMessagesAsync(OperationInputs operationInputs, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -917,7 +929,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 operationInputs.Validate();
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -925,7 +936,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("operationInputs", operationInputs);
                 tracingParameters.Add("cancellationToken", cancellationToken);
                 ServiceClientTracing.Enter(_invocationId, this, "CheckSubdomainAvailability", tracingParameters);
@@ -935,9 +945,9 @@ internal AppsOperations(IotCentralClient client)
             var _url = new System.Uri(new System.Uri(_baseUrl + (_baseUrl.EndsWith("/") ? "" : "/")), "subscriptions/{subscriptionId}/providers/Microsoft.IoTCentral/checkSubdomainAvailability").ToString();
             _url = _url.Replace("{subscriptionId}", System.Uri.EscapeDataString(Client.SubscriptionId));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -1096,11 +1106,14 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<IPage<AppTemplate>>> ListTemplatesWithHttpMessagesAsync(Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -1108,7 +1121,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("cancellationToken", cancellationToken);
                 ServiceClientTracing.Enter(_invocationId, this, "ListTemplates", tracingParameters);
             }
@@ -1117,9 +1129,9 @@ internal AppsOperations(IotCentralClient client)
             var _url = new System.Uri(new System.Uri(_baseUrl + (_baseUrl.EndsWith("/") ? "" : "/")), "subscriptions/{subscriptionId}/providers/Microsoft.IoTCentral/appTemplates").ToString();
             _url = _url.Replace("{subscriptionId}", System.Uri.EscapeDataString(Client.SubscriptionId));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -1284,6 +1296,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<App>> BeginCreateOrUpdateWithHttpMessagesAsync(string resourceGroupName, string resourceName, App app, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -1304,7 +1320,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 app.Validate();
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -1312,7 +1327,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("resourceGroupName", resourceGroupName);
                 tracingParameters.Add("resourceName", resourceName);
                 tracingParameters.Add("app", app);
@@ -1326,9 +1340,9 @@ internal AppsOperations(IotCentralClient client)
             _url = _url.Replace("{resourceGroupName}", System.Uri.EscapeDataString(resourceGroupName));
             _url = _url.Replace("{resourceName}", System.Uri.EscapeDataString(resourceName));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -1514,6 +1528,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse<App>> BeginUpdateWithHttpMessagesAsync(string resourceGroupName, string resourceName, AppPatch appPatch, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -1530,7 +1548,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "appPatch");
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -1538,7 +1555,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("resourceGroupName", resourceGroupName);
                 tracingParameters.Add("resourceName", resourceName);
                 tracingParameters.Add("appPatch", appPatch);
@@ -1552,9 +1568,9 @@ internal AppsOperations(IotCentralClient client)
             _url = _url.Replace("{resourceGroupName}", System.Uri.EscapeDataString(resourceGroupName));
             _url = _url.Replace("{resourceName}", System.Uri.EscapeDataString(resourceName));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
@@ -1716,6 +1732,10 @@ internal AppsOperations(IotCentralClient client)
         /// </return>
         public async Task<AzureOperationResponse> BeginDeleteWithHttpMessagesAsync(string resourceGroupName, string resourceName, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             if (Client.SubscriptionId == null)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.SubscriptionId");
@@ -1728,7 +1748,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "resourceName");
             }
-            string apiVersion = "2018-09-01";
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -1736,7 +1755,6 @@ internal AppsOperations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("resourceGroupName", resourceGroupName);
                 tracingParameters.Add("resourceName", resourceName);
                 tracingParameters.Add("cancellationToken", cancellationToken);
@@ -1749,9 +1767,9 @@ internal AppsOperations(IotCentralClient client)
             _url = _url.Replace("{resourceGroupName}", System.Uri.EscapeDataString(resourceGroupName));
             _url = _url.Replace("{resourceName}", System.Uri.EscapeDataString(resourceName));
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
diff --git a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/AppPatch.cs b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/AppPatch.cs
index 3cbd09426950..1e5769cedb3c 100644
--- a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/AppPatch.cs
+++ b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/AppPatch.cs
@@ -35,6 +35,7 @@ public AppPatch()
         /// Initializes a new instance of the AppPatch class.
         /// </summary>
         /// <param name="tags">Instance tags</param>
+        /// <param name="sku">A valid instance SKU.</param>
         /// <param name="applicationId">The ID of the application.</param>
         /// <param name="displayName">The display name of the
         /// application.</param>
@@ -44,9 +45,10 @@ public AppPatch()
         /// application. Optional; if not specified, defaults to a blank
         /// blueprint and allows the application to be defined from
         /// scratch.</param>
-        public AppPatch(IDictionary<string, string> tags = default(IDictionary<string, string>), string applicationId = default(string), string displayName = default(string), string subdomain = default(string), string template = default(string))
+        public AppPatch(IDictionary<string, string> tags = default(IDictionary<string, string>), AppSkuInfo sku = default(AppSkuInfo), string applicationId = default(string), string displayName = default(string), string subdomain = default(string), string template = default(string))
         {
             Tags = tags;
+            Sku = sku;
             ApplicationId = applicationId;
             DisplayName = displayName;
             Subdomain = subdomain;
@@ -65,6 +67,12 @@ public AppPatch()
         [JsonProperty(PropertyName = "tags")]
         public IDictionary<string, string> Tags { get; set; }
 
+        /// <summary>
+        /// Gets or sets a valid instance SKU.
+        /// </summary>
+        [JsonProperty(PropertyName = "sku")]
+        public AppSkuInfo Sku { get; set; }
+
         /// <summary>
         /// Gets the ID of the application.
         /// </summary>
@@ -92,5 +100,18 @@ public AppPatch()
         [JsonProperty(PropertyName = "properties.template")]
         public string Template { get; set; }
 
+        /// <summary>
+        /// Validate the object.
+        /// </summary>
+        /// <exception cref="ValidationException">
+        /// Thrown if validation fails
+        /// </exception>
+        public virtual void Validate()
+        {
+            if (Sku != null)
+            {
+                Sku.Validate();
+            }
+        }
     }
 }
diff --git a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/Resource.cs b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/Resource.cs
index d8c3c98596ce..f1330a2219b3 100644
--- a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/Resource.cs
+++ b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Models/Resource.cs
@@ -95,6 +95,13 @@ public virtual void Validate()
             {
                 throw new ValidationException(ValidationRules.CannotBeNull, "Location");
             }
+            if (Name != null)
+            {
+                if (!System.Text.RegularExpressions.Regex.IsMatch(Name, "^(?![0-9]+$)(?!-)[a-zA-Z0-9-]{2,99}[a-zA-Z0-9]$"))
+                {
+                    throw new ValidationException(ValidationRules.Pattern, "Name", "^(?![0-9]+$)(?!-)[a-zA-Z0-9-]{2,99}[a-zA-Z0-9]$");
+                }
+            }
         }
     }
 }
diff --git a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Operations.cs b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Operations.cs
index da9786aab0a2..9f9db537c879 100644
--- a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Operations.cs
+++ b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/Operations.cs
@@ -65,12 +65,21 @@ internal Operations(IotCentralClient client)
         /// <exception cref="SerializationException">
         /// Thrown when unable to deserialize the response
         /// </exception>
+        /// <exception cref="ValidationException">
+        /// Thrown when a required parameter is null
+        /// </exception>
+        /// <exception cref="System.ArgumentNullException">
+        /// Thrown when a required parameter is null
+        /// </exception>
         /// <return>
         /// A response object containing the response body and response headers.
         /// </return>
         public async Task<AzureOperationResponse<IPage<Operation>>> ListWithHttpMessagesAsync(Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
         {
-            string apiVersion = "2018-09-01";
+            if (Client.ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.Client.ApiVersion");
+            }
             // Tracing
             bool _shouldTrace = ServiceClientTracing.IsEnabled;
             string _invocationId = null;
@@ -78,7 +87,6 @@ internal Operations(IotCentralClient client)
             {
                 _invocationId = ServiceClientTracing.NextInvocationId.ToString();
                 Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
-                tracingParameters.Add("apiVersion", apiVersion);
                 tracingParameters.Add("cancellationToken", cancellationToken);
                 ServiceClientTracing.Enter(_invocationId, this, "List", tracingParameters);
             }
@@ -86,9 +94,9 @@ internal Operations(IotCentralClient client)
             var _baseUrl = Client.BaseUri.AbsoluteUri;
             var _url = new System.Uri(new System.Uri(_baseUrl + (_baseUrl.EndsWith("/") ? "" : "/")), "providers/Microsoft.IoTCentral/operations").ToString();
             List<string> _queryParameters = new List<string>();
-            if (apiVersion != null)
+            if (Client.ApiVersion != null)
             {
-                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(apiVersion)));
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(Client.ApiVersion)));
             }
             if (_queryParameters.Count > 0)
             {
diff --git a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/SdkInfo_IotCentralClient.cs b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/SdkInfo_IotCentralClient.cs
index d1e261ed5ac2..93a05f67db95 100644
--- a/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/SdkInfo_IotCentralClient.cs
+++ b/sdk/iotcentral/Microsoft.Azure.Management.IotCentral/src/Generated/SdkInfo_IotCentralClient.cs
@@ -24,16 +24,5 @@ public static IEnumerable<Tuple<string, string, string>> ApiInfo_IotCentralClien
               }.AsEnumerable();
           }
       }
-      // BEGIN: Code Generation Metadata Section
-      public static readonly String AutoRestVersion = "latest";
-      public static readonly String AutoRestBootStrapperVersion = "autorest@3.0.6187";
-      public static readonly String AutoRestCmdExecuted = "cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/iotcentral/resource-manager/readme.md --csharp --version=latest --reflect-api-versions --csharp.output-folder=D:\\azure-sdk-for-net\\sdk\\iotcentral\\Microsoft.Azure.Management.IotCentral\\src\\Generated";
-      public static readonly String GithubForkName = "Azure";
-      public static readonly String GithubBranchName = "master";
-      public static readonly String GithubCommidId = "57ba23526b8ef2ddd52165d54e20d66f5563e8f4";
-      public static readonly String CodeGenerationErrors = "";
-      public static readonly String GithubRepoName = "azure-rest-api-specs";
-      // END: Code Generation Metadata Section
   }
 }
-