diff --git a/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.Tests/FilterTest.cs b/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.Tests/FilterTest.cs
index c272b8f3f72b..bb672b05bc31 100644
--- a/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.Tests/FilterTest.cs
+++ b/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1.Tests/FilterTest.cs
@@ -54,6 +54,54 @@ public void Equal()
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void NotEqual()
+        {
+            var actual = Filter.NotEqual("x", 1);
+            var expected = new Filter
+            {
+                PropertyFilter = new PropertyFilter
+                {
+                    Op = Operator.NotEqual,
+                    Property = new PropertyReference { Name = "x" },
+                    Value = new Value { IntegerValue = 1 }
+                }
+            };
+            Assert.Equal(expected, actual);
+        }
+
+        [Fact]
+        public void NotIn()
+        {
+            var actual = Filter.NotIn("x", new ArrayValue(new string[2] { "1", "2" }));
+            var expected = new Filter
+            {
+                PropertyFilter = new PropertyFilter
+                {
+                    Op = Operator.NotIn,
+                    Property = new PropertyReference { Name = "x" },
+                    Value = new ArrayValue(new string[2] { "1", "2" })
+                }
+            };
+            Assert.Equal(expected, actual);
+        }
+
+        [Fact]
+        public void In()
+        {
+            var actual = Filter.In("1", new ArrayValue(new string[2] { "1", "2" }));
+            var expected = new Filter
+            {
+                PropertyFilter = new PropertyFilter
+                {
+                    Op = Operator.In,
+                    Property = new PropertyReference { Name = "1" },
+                    Value = new ArrayValue(new string[2] { "1", "2" })
+                }
+            };
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void GreaterThan()
         {
diff --git a/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1/FilterPartial.cs b/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1/FilterPartial.cs
index 6bea35e05ad1..006b79b54c6b 100644
--- a/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1/FilterPartial.cs
+++ b/apis/Google.Cloud.Datastore.V1/Google.Cloud.Datastore.V1/FilterPartial.cs
@@ -62,6 +62,34 @@ public static Filter And(IEnumerable<Filter> filters)
         public static Filter Equal(string propertyName, Value propertyValue) =>
             Property(propertyName, propertyValue, Operator.Equal);
 
+        /// <summary>
+        /// Creates a filter to check that the specified property is not equal to a given value.
+        /// </summary>
+        /// <param name="propertyName">The name of the property. Must not be null.</param>
+        /// <param name="propertyValue">The value to compare against. May be null, which indicates
+        /// a value with <see cref="Value.NullValue"/> set.</param>
+        /// <returns>The newly created filter.</returns>
+        public static Filter NotEqual(string propertyName, Value propertyValue) =>
+            Property(propertyName, propertyValue, Operator.NotEqual);
+
+        /// <summary>
+        /// Creates a filter to check that the specified property is in a given array of values.
+        /// </summary>
+        /// <param name="value">The name of the property. Must not be null.</param>
+        /// <param name="collection">The array of values to compare against. </param>
+        /// <returns>The newly created filter.</returns>
+        public static Filter In(string value, ArrayValue collection) =>
+            Property(value, collection, Operator.In);
+
+        /// <summary>
+        /// Creates a filter to check that the specified property is not in a given array of values.
+        /// </summary>
+        /// <param name="value">The name of the property. Must not be null.</param>
+        /// <param name="collection">The array of values to compare against. </param>
+        /// <returns>The newly created filter.</returns>
+        public static Filter NotIn(string value, ArrayValue collection) =>
+            Property(value, collection, Operator.NotIn);
+
         /// <summary>
         /// Creates a filter to check that the specified property is less than a given value.
         /// </summary>