优化更新代码，添加界面功能并整合

ShrlAlgo.RvKits/RvIndependent/MetroGauges/LandXMLData/SolidInstances.cs

@@ -0,0 +1,20 @@
+using System.Xml.Serialization;
+
+namespace ShrlAlgo.RvKits.RvIndependent.MetroGauges.LandXMLData
+{
+    [XmlType("SolidInstances")]
+    [Serializable]
+    public class SolidInstances
+    {
+        public SolidInstances()
+        {
+            Locations = new List<Location>();
+        }
+
+        [XmlElement("Location")]
+        public List<Location> Locations { get; set; }
+
+        [XmlElement("Model")]
+        public SolidModel Model { get; set; }
+    }
+}