diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/CognitiveServicesAccount.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/CognitiveServicesAccount.cs
index 2a060e0925bc..2780d0f16127 100644
--- a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/CognitiveServicesAccount.cs
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/CognitiveServicesAccount.cs
@@ -49,6 +49,8 @@ public CognitiveServicesAccount()
         /// <param name="internalId">The internal identifier.</param>
         /// <param name="customSubDomainName">Optional subdomain name used for
         /// token-based authentication.</param>
+        /// <param name="networkAcls">A collection of rules governing the
+        /// accessibility from specific network locations.</param>
         /// <param name="sku">The SKU of Cognitive Services account.</param>
         /// <param name="tags">Gets or sets a list of key value pairs that
         /// describe the resource. These tags can be used in viewing and
@@ -57,7 +59,7 @@ public CognitiveServicesAccount()
         /// greater than 128 characters and value no greater than 256
         /// characters.</param>
         /// <param name="type">Resource type</param>
-        public CognitiveServicesAccount(string etag = default(string), string id = default(string), string kind = default(string), string location = default(string), string name = default(string), string provisioningState = default(string), string endpoint = default(string), string internalId = default(string), string customSubDomainName = default(string), Sku sku = default(Sku), IDictionary<string, string> tags = default(IDictionary<string, string>), string type = default(string))
+        public CognitiveServicesAccount(string etag = default(string), string id = default(string), string kind = default(string), string location = default(string), string name = default(string), string provisioningState = default(string), string endpoint = default(string), string internalId = default(string), string customSubDomainName = default(string), NetworkRuleSet networkAcls = default(NetworkRuleSet), Sku sku = default(Sku), IDictionary<string, string> tags = default(IDictionary<string, string>), string type = default(string))
         {
             Etag = etag;
             Id = id;
@@ -68,6 +70,7 @@ public CognitiveServicesAccount()
             Endpoint = endpoint;
             InternalId = internalId;
             CustomSubDomainName = customSubDomainName;
+            NetworkAcls = networkAcls;
             Sku = sku;
             Tags = tags;
             Type = type;
@@ -136,6 +139,13 @@ public CognitiveServicesAccount()
         [JsonProperty(PropertyName = "properties.customSubDomainName")]
         public string CustomSubDomainName { get; set; }
 
+        /// <summary>
+        /// Gets or sets a collection of rules governing the accessibility from
+        /// specific network locations.
+        /// </summary>
+        [JsonProperty(PropertyName = "properties.networkAcls")]
+        public NetworkRuleSet NetworkAcls { get; set; }
+
         /// <summary>
         /// Gets or sets the SKU of Cognitive Services account.
         /// </summary>
diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/IPRule.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/IPRule.cs
new file mode 100644
index 000000000000..e5150ad46748
--- /dev/null
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/IPRule.cs
@@ -0,0 +1,70 @@
+// <auto-generated>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for
+// license information.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+    using Microsoft.Rest;
+    using Newtonsoft.Json;
+    using System.Linq;
+
+    /// <summary>
+    /// A rule governing the accessibility from a specific ip address or ip
+    /// range.
+    /// </summary>
+    public partial class IPRule
+    {
+        /// <summary>
+        /// Initializes a new instance of the IPRule class.
+        /// </summary>
+        public IPRule()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the IPRule class.
+        /// </summary>
+        /// <param name="value">An IPv4 address range in CIDR notation, such as
+        /// '124.56.78.91' (simple IP address) or '124.56.78.0/24' (all
+        /// addresses that start with 124.56.78).</param>
+        public IPRule(string value)
+        {
+            Value = value;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets an IPv4 address range in CIDR notation, such as
+        /// '124.56.78.91' (simple IP address) or '124.56.78.0/24' (all
+        /// addresses that start with 124.56.78).
+        /// </summary>
+        [JsonProperty(PropertyName = "value")]
+        public string Value { get; set; }
+
+        /// <summary>
+        /// Validate the object.
+        /// </summary>
+        /// <exception cref="ValidationException">
+        /// Thrown if validation fails
+        /// </exception>
+        public virtual void Validate()
+        {
+            if (Value == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "Value");
+            }
+        }
+    }
+}
diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleAction.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleAction.cs
new file mode 100644
index 000000000000..fac179646c85
--- /dev/null
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleAction.cs
@@ -0,0 +1,22 @@
+// <auto-generated>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for
+// license information.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+
+    /// <summary>
+    /// Defines values for NetworkRuleAction.
+    /// </summary>
+    public static class NetworkRuleAction
+    {
+        public const string Allow = "Allow";
+        public const string Deny = "Deny";
+    }
+}
diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleBypassOptions.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleBypassOptions.cs
new file mode 100644
index 000000000000..7fe11f223842
--- /dev/null
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleBypassOptions.cs
@@ -0,0 +1,22 @@
+// <auto-generated>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for
+// license information.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+
+    /// <summary>
+    /// Defines values for NetworkRuleBypassOptions.
+    /// </summary>
+    public static class NetworkRuleBypassOptions
+    {
+        public const string AzureServices = "AzureServices";
+        public const string None = "None";
+    }
+}
diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleSet.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleSet.cs
new file mode 100644
index 000000000000..0180c4d2233c
--- /dev/null
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/NetworkRuleSet.cs
@@ -0,0 +1,89 @@
+// <auto-generated>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for
+// license information.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+    using Newtonsoft.Json;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Linq;
+
+    /// <summary>
+    /// A set of rules governing the network accessibility.
+    /// </summary>
+    public partial class NetworkRuleSet
+    {
+        /// <summary>
+        /// Initializes a new instance of the NetworkRuleSet class.
+        /// </summary>
+        public NetworkRuleSet()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the NetworkRuleSet class.
+        /// </summary>
+        /// <param name="bypass">Tells what traffic can bypass network rules.
+        /// This can be 'AzureServices' or 'None'.  If not specified the
+        /// default is 'AzureServices'. Possible values include:
+        /// 'AzureServices', 'None'</param>
+        /// <param name="defaultAction">The default action when no rule from
+        /// ipRules and from virtualNetworkRules match. This is only used after
+        /// the bypass property has been evaluated. Possible values include:
+        /// 'Allow', 'Deny'</param>
+        /// <param name="ipRules">The list of IP address rules.</param>
+        /// <param name="virtualNetworkRules">The list of virtual network
+        /// rules.</param>
+        public NetworkRuleSet(string bypass = default(string), string defaultAction = default(string), IList<IPRule> ipRules = default(IList<IPRule>), IList<VirtualNetworkRule> virtualNetworkRules = default(IList<VirtualNetworkRule>))
+        {
+            Bypass = bypass;
+            DefaultAction = defaultAction;
+            IpRules = ipRules;
+            VirtualNetworkRules = virtualNetworkRules;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets tells what traffic can bypass network rules. This can
+        /// be 'AzureServices' or 'None'.  If not specified the default is
+        /// 'AzureServices'. Possible values include: 'AzureServices', 'None'
+        /// </summary>
+        [JsonProperty(PropertyName = "bypass")]
+        public string Bypass { get; set; }
+
+        /// <summary>
+        /// Gets or sets the default action when no rule from ipRules and from
+        /// virtualNetworkRules match. This is only used after the bypass
+        /// property has been evaluated. Possible values include: 'Allow',
+        /// 'Deny'
+        /// </summary>
+        [JsonProperty(PropertyName = "defaultAction")]
+        public string DefaultAction { get; set; }
+
+        /// <summary>
+        /// Gets or sets the list of IP address rules.
+        /// </summary>
+        [JsonProperty(PropertyName = "ipRules")]
+        public IList<IPRule> IpRules { get; set; }
+
+        /// <summary>
+        /// Gets or sets the list of virtual network rules.
+        /// </summary>
+        [JsonProperty(PropertyName = "virtualNetworkRules")]
+        public IList<VirtualNetworkRule> VirtualNetworkRules { get; set; }
+
+    }
+}
diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/VirtualNetworkRule.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/VirtualNetworkRule.cs
new file mode 100644
index 000000000000..f3325f37faa7
--- /dev/null
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/Models/VirtualNetworkRule.cs
@@ -0,0 +1,75 @@
+// <auto-generated>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for
+// license information.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+    using Microsoft.Rest;
+    using Newtonsoft.Json;
+    using System.Linq;
+
+    /// <summary>
+    /// A rule governing the accessibility from a specific virtual network.
+    /// </summary>
+    public partial class VirtualNetworkRule
+    {
+        /// <summary>
+        /// Initializes a new instance of the VirtualNetworkRule class.
+        /// </summary>
+        public VirtualNetworkRule()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the VirtualNetworkRule class.
+        /// </summary>
+        /// <param name="id">Full resource id of a vnet subnet, such as
+        /// '/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworks/test-vnet/subnets/subnet1'.</param>
+        /// <param name="state">Gets the state of virtual network rule.</param>
+        public VirtualNetworkRule(string id, string state = default(string))
+        {
+            Id = id;
+            State = state;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets full resource id of a vnet subnet, such as
+        /// '/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworks/test-vnet/subnets/subnet1'.
+        /// </summary>
+        [JsonProperty(PropertyName = "id")]
+        public string Id { get; set; }
+
+        /// <summary>
+        /// Gets the state of virtual network rule.
+        /// </summary>
+        [JsonProperty(PropertyName = "state")]
+        public string State { get; set; }
+
+        /// <summary>
+        /// Validate the object.
+        /// </summary>
+        /// <exception cref="ValidationException">
+        /// Thrown if validation fails
+        /// </exception>
+        public virtual void Validate()
+        {
+            if (Id == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "Id");
+            }
+        }
+    }
+}
diff --git a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/SdkInfo_CognitiveServicesManagementClient.cs b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/SdkInfo_CognitiveServicesManagementClient.cs
index 34f1ec8db904..14cb92cbea3b 100644
--- a/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/SdkInfo_CognitiveServicesManagementClient.cs
+++ b/src/SDKs/CognitiveServices/management/Management.CognitiveServices/Generated/SdkInfo_CognitiveServicesManagementClient.cs
@@ -26,16 +26,5 @@ public static IEnumerable<Tuple<string, string, string>> ApiInfo_CognitiveServic
               }.AsEnumerable();
           }
       }
-      // BEGIN: Code Generation Metadata Section
-      public static readonly String AutoRestVersion = "latest";
-      public static readonly String AutoRestBootStrapperVersion = "autorest@2.0.4283";
-      public static readonly String AutoRestCmdExecuted = "cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/cognitiveservices/resource-manager/readme.md --csharp --version=latest --reflect-api-versions --csharp-sdks-folder=D:\\Github\\azure-sdk-for-net\\src\\SDKs";
-      public static readonly String GithubForkName = "Azure";
-      public static readonly String GithubBranchName = "master";
-      public static readonly String GithubCommidId = "04f162b085db0ce088c8e60a8539db1fafb46c7b";
-      public static readonly String CodeGenerationErrors = "";
-      public static readonly String GithubRepoName = "azure-rest-api-specs";
-      // END: Code Generation Metadata Section
   }
 }
-