port from perforce

intromat/Intromat/PersistentModel/PositionModel.cs

@@ -0,0 +1,19 @@
+using System.Windows;
+using System.Xml.Serialization;
+
+namespace Intromat.PersistentModel
+{
+    public struct PositionModel
+    {
+        [XmlAttribute]
+        public double X { get; set; }
+
+        [XmlAttribute]
+        public double Y { get; set; }
+
+        public static implicit operator Point(PositionModel position)
+        {
+            return new(position.X, position.Y);
+        }
+    }
+}