添加项目文件。

AddInManager/VisibilityMode.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace AddInManager
+{
+    [Flags]
+    public enum VisibilityMode
+    {
+        AlwaysVisible = 0,
+        NotVisibleInProject = 1,
+        NotVisibleInFamily = 2,
+        NotVisibleWhenNoActiveDocument = 4,
+        NotVisibleInArchitecture = 8,
+        NotVisibleInStructure = 16,
+        NotVisibleInMechanical = 32,
+        NotVisibleInElectrical = 64,
+        NotVisibleInPlumbing = 128,
+        NotVisibleInMEP = 224
+    }
+}