diff --git a/src/Twilio/Constant/EnumConstants.cs b/src/Twilio/Constant/EnumConstants.cs
new file mode 100644
index 000000000..9a9332e28
--- /dev/null
+++ b/src/Twilio/Constant/EnumConstants.cs
@@ -0,0 +1,17 @@
+using Newtonsoft.Json;
+using Twilio.Converters;
+using Twilio.Types;
+
+namespace Twilio.Constant
+{
+    public class EnumConstants
+    {
+        [JsonConverter(typeof(StringEnumConverter))]
+        public sealed class ContentTypeEnum : StringEnum
+        {
+            private ContentTypeEnum(string value) : base(value) {}
+            public static readonly ContentTypeEnum JSON = new ContentTypeEnum("application/json");
+            public static readonly ContentTypeEnum FORM_URLENCODED = new ContentTypeEnum("application/x-www-form-urlencoded");
+        }
+    }
+}
diff --git a/test/Twilio.Test/Constant/EnumConstantsTest.cs b/test/Twilio.Test/Constant/EnumConstantsTest.cs
new file mode 100644
index 000000000..af1b70683
--- /dev/null
+++ b/test/Twilio.Test/Constant/EnumConstantsTest.cs
@@ -0,0 +1,20 @@
+using NUnit.Framework;
+using Twilio.Constant;
+
+namespace Twilio.Tests.Constant
+{
+    [TestFixture]
+    public class EnumConstantsTest
+    {
+        
+        [Test]
+        public void EnumConstantComparison()
+        {
+            var jsonContentType = EnumConstants.ContentTypeEnum.JSON;
+            var formUrlEncodedType = EnumConstants.ContentTypeEnum.FORM_URLENCODED;
+            
+            Assert.AreEqual("application/json", jsonContentType.ToString());
+            Assert.AreEqual("application/x-www-form-urlencoded", formUrlEncodedType.ToString());
+        }
+    }
+}
\ No newline at end of file