diff --git a/src/redmine-net-api/Serialization/IRedmineSerializer.cs b/src/redmine-net-api/Serialization/IRedmineSerializer.cs
new file mode 100644
index 00000000..1c2e5eec
--- /dev/null
+++ b/src/redmine-net-api/Serialization/IRedmineSerializer.cs
@@ -0,0 +1,44 @@
+/*
+   Copyright 2011 - 2023 Adrian Popescu
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+namespace Redmine.Net.Api.Serialization
+{
+    /// <summary>
+    /// Serialization interface that supports serialize and deserialize methods.
+    /// </summary>
+    internal interface IRedmineSerializer
+    {
+        /// <summary>
+        /// Gets the application format this serializer supports (e.g. "json", "xml").
+        /// </summary>
+        string Format { get; }
+
+        /// <summary>
+        /// Serializes the specified object into a string.
+        /// </summary>
+        string Serialize<T>(T obj) where T : class;
+     
+        /// <summary>
+        /// Deserializes the string into a PageResult of T object.
+        /// </summary>
+        PagedResults<T> DeserializeToPagedResults<T>(string response) where T : class, new();
+
+        /// <summary>
+        /// Deserializes the string into an object.
+        /// </summary>
+        T Deserialize<T>(string input) where T : new();
+    }
+}
\ No newline at end of file
diff --git a/src/redmine-net-api/Serialization/Json/JsonRedmineSerializer.cs b/src/redmine-net-api/Serialization/Json/JsonRedmineSerializer.cs
index 43cf4e8a..42807e3f 100644
--- a/src/redmine-net-api/Serialization/Json/JsonRedmineSerializer.cs
+++ b/src/redmine-net-api/Serialization/Json/JsonRedmineSerializer.cs
@@ -135,7 +135,7 @@ internal sealed class JsonRedmineSerializer : IRedmineSerializer
         }
         #pragma warning restore CA1822
         
-        public string Type { get; } = "json";
+        public string Format { get; } = "json";
 
         public string Serialize<T>(T entity) where T : class
         {
@@ -155,7 +155,7 @@ public string Serialize<T>(T entity) where T : class
             {
                 using (var writer = new JsonTextWriter(sw))
                 {
-                    writer.Formatting = Newtonsoft.Json.Formatting.Indented;
+                    writer.Formatting = Formatting.Indented;
                     writer.DateFormatHandling = DateFormatHandling.IsoDateFormat;
 
                     jsonSerializable.WriteJson(writer);
diff --git a/src/redmine-net-api/Serialization/Xml/XmlRedmineSerializer.cs b/src/redmine-net-api/Serialization/Xml/XmlRedmineSerializer.cs
index be1764a0..179eaec0 100644
--- a/src/redmine-net-api/Serialization/Xml/XmlRedmineSerializer.cs
+++ b/src/redmine-net-api/Serialization/Xml/XmlRedmineSerializer.cs
@@ -27,20 +27,17 @@ namespace Redmine.Net.Api.Serialization
     internal sealed class XmlRedmineSerializer : IRedmineSerializer
     {
 
-        public XmlRedmineSerializer()
+        public XmlRedmineSerializer(): this(new XmlWriterSettings
         {
-            xmlWriterSettings = new XmlWriterSettings
-            {
-                OmitXmlDeclaration = true
-            };
-        }
+            OmitXmlDeclaration = true
+        }) { }
 
         public XmlRedmineSerializer(XmlWriterSettings xmlWriterSettings)
         {
-            this.xmlWriterSettings = xmlWriterSettings;
+            this._xmlWriterSettings = xmlWriterSettings;
         }
 
-        private readonly XmlWriterSettings xmlWriterSettings;
+        private readonly XmlWriterSettings _xmlWriterSettings;
 
         public T Deserialize<T>(string response) where T : new()
         {
@@ -53,7 +50,7 @@ public XmlRedmineSerializer(XmlWriterSettings xmlWriterSettings)
                 throw new RedmineException(ex.GetBaseException().Message, ex);
             }
         }
-
+        
         public PagedResults<T> DeserializeToPagedResults<T>(string response) where T : class, new()
         {
             try
@@ -81,7 +78,7 @@ public XmlRedmineSerializer(XmlWriterSettings xmlWriterSettings)
         }
 #pragma warning restore CA1822
 
-        public string Type { get; } = "xml";
+        public string Format => RedmineConstants.XML;
 
         public string Serialize<T>(T entity) where T : class
         {
@@ -153,7 +150,7 @@ private string ToXML<T>(T entity) where T : class
 
             using (var stringWriter = new StringWriter())
             {
-                using (var xmlWriter = XmlWriter.Create(stringWriter, xmlWriterSettings))
+                using (var xmlWriter = XmlWriter.Create(stringWriter, _xmlWriterSettings))
                 {
                     var serializer = new XmlSerializer(typeof(T));