添加项目文件。

RevitKits/MetroGauges/LandXMLData/CircCurve.cs

@@ -0,0 +1,11 @@
+using System.Xml.Serialization;
+
+namespace ShrlAlgoToolkit.RevitAddins.RvIndependent.MetroGauges.LandXMLData
+{
+    [Serializable]
+    public class CircCurve : ParaCurve
+    {
+        [XmlAttribute("radius")]
+        public double Radius { get; set; }
+    }
+}