diff --git a/src/Microsoft.OData.Client/Metadata/ClientTypeUtil.cs b/src/Microsoft.OData.Client/Metadata/ClientTypeUtil.cs
index 13b6696fd5..768b650d9c 100644
--- a/src/Microsoft.OData.Client/Metadata/ClientTypeUtil.cs
+++ b/src/Microsoft.OData.Client/Metadata/ClientTypeUtil.cs
@@ -1,4 +1,4 @@
-//---------------------------------------------------------------------
+//---------------------------------------------------------------------
 // <copyright file="ClientTypeUtil.cs" company="Microsoft">
 //      Copyright (C) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
 // </copyright>
@@ -18,6 +18,7 @@ namespace Microsoft.OData.Client.Metadata
     using Microsoft.OData.Metadata;
     using Microsoft.OData.Edm;
     using Client = Microsoft.OData.Client;
+    using System.Runtime.CompilerServices;
 
     #endregion Namespaces.
 
@@ -835,5 +836,20 @@ private static bool SkipAssembly(Assembly assembly)
                 || assembly.Equals(typeof(EdmModel).Assembly) // OData Edm assembly
                 || assembly.Equals(typeof(Spatial.Geography).Assembly); // Spatial assembly
         }
+
+
+        internal static bool IsAnonymousProperty(this PropertyInfo propertyInfo)
+        {
+            return propertyInfo.DeclaringType.IsAnonymousType();
+        }
+
+        internal static bool IsAnonymousType(this Type type)
+        {
+            return type.IsDefined(typeof(CompilerGeneratedAttribute), false)
+                && type.IsGenericType
+                && (type.Name.Contains("AnonymousType", StringComparison.Ordinal) || type.Name.Contains("AnonType", StringComparison.Ordinal))
+                && (type.Name.StartsWith("<>") || type.Name.StartsWith("VB$"))
+                && (type.Attributes & TypeAttributes.NotPublic) == TypeAttributes.NotPublic;
+        }
     }
 }
diff --git a/src/Microsoft.OData.Client/Metadata/ODataTypeInfo.cs b/src/Microsoft.OData.Client/Metadata/ODataTypeInfo.cs
index 0a8a47fc11..9f6ef0ea87 100644
--- a/src/Microsoft.OData.Client/Metadata/ODataTypeInfo.cs
+++ b/src/Microsoft.OData.Client/Metadata/ODataTypeInfo.cs
@@ -1,4 +1,4 @@
-//---------------------------------------------------------------------
+//---------------------------------------------------------------------
 // <copyright file="ODataTypeInfo.cs" company="Microsoft">
 //      Copyright (C) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
 // </copyright>
@@ -46,7 +46,7 @@ internal class ODataTypeInfo
         public ODataTypeInfo(Type type)
         {
             this.type = type;
-            ServerSideNameDict = new ConcurrentDictionary<string, string>();                      
+            ServerSideNameDict = new ConcurrentDictionary<string, string>();
         }
 
         /// <summary>
@@ -84,8 +84,8 @@ public bool HasProperties
         /// <summary>
         /// Sertver defined type name
         /// </summary>
-        public string ServerDefinedTypeName 
-        { 
+        public string ServerDefinedTypeName
+        {
             get
             {
                 if (_serverDefinedTypeName == null)
@@ -102,7 +102,7 @@ public string ServerDefinedTypeName
                     else
                     {
                         _serverDefinedTypeName = type.Name;
-                    }                    
+                    }
                 }
 
                 return _serverDefinedTypeName;
@@ -251,9 +251,9 @@ private IEnumerable<PropertyInfo> GetAllProperties()
                     (typeof(UIntPtr) == propertyType))
                 {
                     continue;
-                }                    
+                }
 
-                Debug.Assert(!propertyType.ContainsGenericParameters(), "remove when test case is found that encounters this");                
+                Debug.Assert(!propertyType.ContainsGenericParameters(), "remove when test case is found that encounters this");
 
                 if (propertyInfo.CanRead &&
                     (!propertyType.IsValueType() || propertyInfo.CanWrite) &&
@@ -334,10 +334,10 @@ private PropertyInfo[] GetKeyProperties()
                 if (newKeyKind == KeyKind.AttributedKey && keyProperties.Count != dataServiceKeyAttribute?.KeyNames.Count)
                 {
                     var m = (from string a in dataServiceKeyAttribute.KeyNames
-                                where (from b in Properties
+                             where (from b in Properties
                                     where b.Name == a
                                     select b).FirstOrDefault() == null
-                                select a).First<string>();
+                             select a).First<string>();
                     throw Client.Error.InvalidOperation(Client.Strings.ClientType_MissingProperty(typeName, m));
                 }
             }
@@ -381,10 +381,16 @@ private static void InserKeyBasedOnOrder(List<KeyValuePair<PropertyInfo, int>> k
         private static KeyKind IsKeyProperty(PropertyInfo propertyInfo, KeyAttribute dataServiceKeyAttribute, out int order)
         {
             Debug.Assert(propertyInfo != null, "propertyInfo != null");
+            order = -1;
+
+            //If the property's declaring type is anonymous, it is not a key.
+            if (propertyInfo.IsAnonymousProperty())
+            {
+                return KeyKind.NotKey;
+            }
 
             string propertyName = ClientTypeUtil.GetServerDefinedName(propertyInfo);
 
-            order = -1;
             KeyKind keyKind = KeyKind.NotKey;
             if (dataServiceKeyAttribute != null && dataServiceKeyAttribute.KeyNames.Contains(propertyName))
             {
@@ -396,10 +402,10 @@ private static KeyKind IsKeyProperty(PropertyInfo propertyInfo, KeyAttribute dat
                 order = newOrder;
                 keyKind = newKind;
             }
-            else if (propertyName.EndsWith("ID", StringComparison.Ordinal))
+            else if (propertyName.Equals(propertyInfo.DeclaringType.Name + "Id", StringComparison.OrdinalIgnoreCase) || propertyName.Equals("Id", StringComparison.OrdinalIgnoreCase))
             {
                 string declaringTypeName = propertyInfo.DeclaringType.Name;
-                if ((propertyName.Length == (declaringTypeName.Length + 2)) && propertyName.StartsWith(declaringTypeName, StringComparison.Ordinal))
+                if ((propertyName.Length == (declaringTypeName.Length + 2)) && propertyName.StartsWith(declaringTypeName, StringComparison.OrdinalIgnoreCase))
                 {
                     // matched "DeclaringType.Name+ID" pattern
                     keyKind = KeyKind.TypeNameId;
@@ -419,7 +425,7 @@ private static bool IsDataAnnotationsKeyProperty(PropertyInfo propertyInfo, out
             order = -1;
             kind = KeyKind.NotKey;
             var attributes = propertyInfo.GetCustomAttributes();
-            if(!attributes.Any(a => a is System.ComponentModel.DataAnnotations.KeyAttribute))
+            if (!attributes.Any(a => a is System.ComponentModel.DataAnnotations.KeyAttribute))
             {
                 return false;
             }
diff --git a/test/FunctionalTests/Microsoft.OData.Client.Tests/Metadata/ClientTypeUtilTests.cs b/test/FunctionalTests/Microsoft.OData.Client.Tests/Metadata/ClientTypeUtilTests.cs
index db997409d5..f3b97e282d 100644
--- a/test/FunctionalTests/Microsoft.OData.Client.Tests/Metadata/ClientTypeUtilTests.cs
+++ b/test/FunctionalTests/Microsoft.OData.Client.Tests/Metadata/ClientTypeUtilTests.cs
@@ -1,4 +1,4 @@
-//---------------------------------------------------------------------
+//---------------------------------------------------------------------
 // <copyright file="ClientTypeUtilTests.cs" company="Microsoft">
 //      Copyright (C) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
 // </copyright>
@@ -17,6 +17,19 @@ namespace Microsoft.OData.Client.Tests.Metadata
     /// </summary>
     public class ClientTypeUtilTests
     {
+        [Theory]
+        [InlineData(typeof(Giraffe), true)]
+        [InlineData(typeof(Hippo), true)]
+        [InlineData(typeof(Ferret), true)]
+        [InlineData(typeof(Lion), false)]
+        public void IfTypeProperty_HasConventionalKey_TypeIsEntity(Type entityType, bool isEntity)
+        {
+            //Act
+            bool actualResult = ClientTypeUtil.TypeOrElementTypeIsEntity(entityType);
+            //Assert
+            Assert.Equal(actualResult, isEntity);
+        }
+
         [Fact]
         public void IFTypeProperty_HasKeyAttribute_TypeIsEntity()
         {
@@ -214,5 +227,37 @@ public struct EmployeeTypeStruct
             public int EmpTypeId { get; set; }
         }
 
+        public class Giraffe
+        {
+            /// <summary>
+            /// Conventional Id Key property
+            /// </summary>
+            public int Id { get; set; }
+            public string Name { get; set; }
+        }
+
+        public class Hippo
+        {
+            /// <summary>
+            /// Conventional {TypeName + Id} Key Property
+            /// </summary>
+            public int HippoId { get; set; }
+            public double Weight { get; set; }
+        }
+
+        public class Ferret
+        {
+            /// <summary>
+            /// Conventional {TypeName + Id} Key Property with odd casing
+            /// </summary>
+            public int FeRReTID { get; set; }
+            public double Weight { get; set; }
+        }
+
+        public class Lion
+        {
+            public int SomeId { get; set; }
+            public string Name { get; set; }
+        }
     }
 }