添加项目文件。

Util.DiagramDesigner/Helpers/EnumExtension.cs

@@ -0,0 +1,18 @@
+using System;
+using System.ComponentModel;
+using System.Reflection;
+
+namespace Util.DiagramDesigner
+{
+    public static class EnumExtension
+    {
+        public static string GetDescription(this Enum value)
+        {
+            FieldInfo field = value.GetType().GetField(value.ToString());
+            DescriptionAttribute attribute = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) as DescriptionAttribute;
+
+            return attribute == null ? value.ToString() : attribute.Description;
+        }
+
+    }
+}