添加项目文件。

DotNet.RevitUI/MVVM/ObservableObject.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DotNet.RevitUI.MVVM
+{
+    /// <summary>
+    /// 属性通知基类.
+    /// </summary>
+
+    public class ObservableObject : System.ComponentModel.INotifyPropertyChanged
+    {
+        /// <summary>
+        /// 属性改变后触发事件.
+        /// </summary>
+        public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;
+
+        /// <summary>
+        /// 属性改变前触发事件.
+        /// </summary>
+        public event System.ComponentModel.PropertyChangingEventHandler PropertyChanging;
+
+        /// <summary>
+        /// 属性改变委托处理.
+        /// </summary>
+        protected System.ComponentModel.PropertyChangedEventHandler PropertyChangedHandler
+        {
+            get
+            {
+                return this.PropertyChanged;
+            }
+        }
+
+        /// <summary>
+        /// 属性改变委托处理.
+        /// </summary>
+        protected System.ComponentModel.PropertyChangingEventHandler PropertyChangingHandler
+        {
+            get
+            {
+                return this.PropertyChanging;
+            }
+        }
+
+        /// <summary>
+        /// 属性改变之前回调.
+        /// </summary>
+        /// <param name="propertyName">Name of the property.</param>
+        protected virtual void RaisePropertyChanging(string propertyName)
+        {
+            this.PropertyChanging?.Invoke(this, new System.ComponentModel.PropertyChangingEventArgs(propertyName));
+        }
+
+        /// <summary>
+        /// 属性改变之后回调.
+        /// </summary>
+        /// <param name="propertyName">Name of the property.</param>
+        protected virtual void RaisePropertyChanged(string propertyName)
+        {
+            this.PropertyChanged?.Invoke(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
+        }
+    }
+}