Convert DipLocation fully over to properties

SabreTools.Data.Models/Metadata/DipLocation.cs

@@ -1,10 +1,11 @@
+using System;
 using System.Xml.Serialization;
 using Newtonsoft.Json;
 
 namespace SabreTools.Data.Models.Metadata
 {
     [JsonObject("diplocation"), XmlRoot("diplocation")]
-    public class DipLocation : DatItem
+    public class DipLocation : DatItem, ICloneable, IEquatable<DipLocation>
     {
         #region Properties
 
@@ -13,15 +14,44 @@ namespace SabreTools.Data.Models.Metadata
 
         public string? Name { get; set; }
 
-        #endregion
-
-        #region Keys
-
-        /// <remarks>string, possibly long</remarks>
-        public const string NumberKey = "number";
+        public long? Number { get; set; }
 
         #endregion
 
         public DipLocation() => ItemType = ItemType.DipLocation;
+
+        /// <inheritdoc/>
+        public object Clone()
+        {
+            var obj = new DipLocation();
+
+            obj.Inverted = Inverted;
+            obj.Name = Name;
+            obj.Number = Number;
+
+            return obj;
+        }
+
+        /// <inheritdoc/>
+        public bool Equals(DipLocation? other)
+        {
+            // Null never matches
+            if (other is null)
+                return false;
+
+            // Properties
+            if (Inverted != other.Inverted)
+                return false;
+
+            if ((Name is null) ^ (other.Name is null))
+                return false;
+            else if (Name is not null && !Name.Equals(other.Name, StringComparison.OrdinalIgnoreCase))
+                return false;
+
+            if (Number != other.Number)
+                return false;
+
+            return true;
+        }
     }
 }