Split first 2 serializers into partial classes

SabreTools.Serialization/XmlSerializer.Deserializer.cs

@@ -0,0 +1,64 @@
+using System.IO;
+using System.Xml;
+using System.Xml.Serialization;
+
+namespace SabreTools.Serialization
+{
+    /// <summary>
+    /// XML deserializer for nullable types
+    /// </summary>
+    public abstract partial class XmlSerializer<T>
+    {
+        /// <summary>
+        /// Deserializes an XML file to the defined type
+        /// </summary>
+        /// <param name="path">Path to the file to deserialize</param>
+        /// <returns>Deserialized data on success, null on failure</returns>
+        public static T? Deserialize(string path)
+        {
+            try
+            {
+                using var stream = PathProcessor.OpenStream(path);
+                return Deserialize(stream);
+            }
+            catch
+            {
+                // TODO: Handle logging the exception
+                return default;
+            }
+        }
+
+        /// <summary>
+        /// Deserializes an XML file in a stream to the defined type
+        /// </summary>
+        /// <param name="stream">Stream to deserialize</param>
+        /// <returns>Deserialized data on success, null on failure</returns>
+        public static T? Deserialize(Stream? stream)
+        {
+            try
+            {
+                // If the stream is null
+                if (stream == null)
+                    return default;
+
+                // Setup the serializer and the reader
+                var serializer = new XmlSerializer(typeof(T));
+                var settings = new XmlReaderSettings
+                {
+                    CheckCharacters = false,
+                    DtdProcessing = DtdProcessing.Ignore,
+                };
+                var streamReader = new StreamReader(stream);
+                var xmlReader = XmlReader.Create(streamReader, settings);
+
+                // Perform the deserialization and return
+                return (T?)serializer.Deserialize(xmlReader);
+            }
+            catch
+            {
+                // TODO: Handle logging the exception
+                return default;
+            }
+        }
+    }
+}