添加项目文件。

Sai.RvKits/RvIndependent/MetroGauges/LandXMLData/ComparableStructure.cs

@@ -0,0 +1,25 @@
+namespace Sai.Toolkit.Core.LandXMLData
+{
+	public abstract class ComparableStructure<T> : IComparableStructure<T>
+		where T : class
+	{
+		public abstract bool DifferentDescendants(T item);
+
+		public abstract bool DifferentItem(T item);
+
+		public bool Equals(T item)
+		{
+			return !ReferenceEquals(item, null) && !DifferentItem(item) && !DifferentDescendants(item);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return Equals(obj as T);
+		}
+
+		public override int GetHashCode()
+		{
+			return base.GetHashCode();
+		}
+	}
+}