diff --git a/src/SDKs/DataFactory/Management.DataFactory/Generated/Models/ValidationActivity.cs b/src/SDKs/DataFactory/Management.DataFactory/Generated/Models/ValidationActivity.cs
new file mode 100644
index 000000000000..e3d4412c85ca
--- /dev/null
+++ b/src/SDKs/DataFactory/Management.DataFactory/Generated/Models/ValidationActivity.cs
@@ -0,0 +1,139 @@
+// <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.DataFactory.Models
+{
+    using Microsoft.Rest;
+    using Microsoft.Rest.Serialization;
+    using Newtonsoft.Json;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Linq;
+
+    /// <summary>
+    /// This activity verifies that an external resource exists.
+    /// </summary>
+    [Newtonsoft.Json.JsonObject("Validation")]
+    [Rest.Serialization.JsonTransformation]
+    public partial class ValidationActivity : ControlActivity
+    {
+        /// <summary>
+        /// Initializes a new instance of the ValidationActivity class.
+        /// </summary>
+        public ValidationActivity()
+        {
+            Dataset = new DatasetReference();
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the ValidationActivity class.
+        /// </summary>
+        /// <param name="name">Activity name.</param>
+        /// <param name="dataset">Validation activity dataset
+        /// reference.</param>
+        /// <param name="additionalProperties">Unmatched properties from the
+        /// message are deserialized this collection</param>
+        /// <param name="description">Activity description.</param>
+        /// <param name="dependsOn">Activity depends on condition.</param>
+        /// <param name="userProperties">Activity user properties.</param>
+        /// <param name="timeout">Specifies the timeout for the activity to
+        /// run. If there is no value specified, it takes the value of
+        /// TimeSpan.FromDays(7) which is 1 week as default. Type: string (or
+        /// Expression with resultType string), pattern:
+        /// ((\d+)\.)?(\d\d):(60|([0-5][0-9])):(60|([0-5][0-9])).</param>
+        /// <param name="sleep">A delay in seconds between validation attempts.
+        /// If no value is specified, 10 seconds will be used as the default.
+        /// Type: integer (or Expression with resultType integer).</param>
+        /// <param name="minimumSize">Can be used if dataset points to a file.
+        /// The file must be greater than or equal in size to the value
+        /// specified. Type: integer (or Expression with resultType
+        /// integer).</param>
+        /// <param name="childItems">Can be used if dataset points to a folder.
+        /// If set to true, the folder must have at least one file. If set to
+        /// false, the folder must be empty. Type: boolean (or Expression with
+        /// resultType boolean).</param>
+        public ValidationActivity(string name, DatasetReference dataset, IDictionary<string, object> additionalProperties = default(IDictionary<string, object>), string description = default(string), IList<ActivityDependency> dependsOn = default(IList<ActivityDependency>), IList<UserProperty> userProperties = default(IList<UserProperty>), object timeout = default(object), object sleep = default(object), object minimumSize = default(object), object childItems = default(object))
+            : base(name, additionalProperties, description, dependsOn, userProperties)
+        {
+            Timeout = timeout;
+            Sleep = sleep;
+            MinimumSize = minimumSize;
+            ChildItems = childItems;
+            Dataset = dataset;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets specifies the timeout for the activity to run. If
+        /// there is no value specified, it takes the value of
+        /// TimeSpan.FromDays(7) which is 1 week as default. Type: string (or
+        /// Expression with resultType string), pattern:
+        /// ((\d+)\.)?(\d\d):(60|([0-5][0-9])):(60|([0-5][0-9])).
+        /// </summary>
+        [JsonProperty(PropertyName = "typeProperties.timeout")]
+        public object Timeout { get; set; }
+
+        /// <summary>
+        /// Gets or sets a delay in seconds between validation attempts. If no
+        /// value is specified, 10 seconds will be used as the default. Type:
+        /// integer (or Expression with resultType integer).
+        /// </summary>
+        [JsonProperty(PropertyName = "typeProperties.sleep")]
+        public object Sleep { get; set; }
+
+        /// <summary>
+        /// Gets or sets can be used if dataset points to a file. The file must
+        /// be greater than or equal in size to the value specified. Type:
+        /// integer (or Expression with resultType integer).
+        /// </summary>
+        [JsonProperty(PropertyName = "typeProperties.minimumSize")]
+        public object MinimumSize { get; set; }
+
+        /// <summary>
+        /// Gets or sets can be used if dataset points to a folder. If set to
+        /// true, the folder must have at least one file. If set to false, the
+        /// folder must be empty. Type: boolean (or Expression with resultType
+        /// boolean).
+        /// </summary>
+        [JsonProperty(PropertyName = "typeProperties.childItems")]
+        public object ChildItems { get; set; }
+
+        /// <summary>
+        /// Gets or sets validation activity dataset reference.
+        /// </summary>
+        [JsonProperty(PropertyName = "typeProperties.dataset")]
+        public DatasetReference Dataset { get; set; }
+
+        /// <summary>
+        /// Validate the object.
+        /// </summary>
+        /// <exception cref="ValidationException">
+        /// Thrown if validation fails
+        /// </exception>
+        public override void Validate()
+        {
+            base.Validate();
+            if (Dataset == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "Dataset");
+            }
+            if (Dataset != null)
+            {
+                Dataset.Validate();
+            }
+        }
+    }
+}