--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MetroWpf/MetroWpf.Framework/Extensions/PropertyExtensions.cs	Mon Mar 12 23:05:21 2012 +0800
@@ -0,0 +1,84 @@
+using System;
+using System.ComponentModel;
+using System.Linq.Expressions;
+
+namespace Chronos.Presentation.ViewModel
+{
+    /// <summary>
+    /// Property Extension Methods
+    /// </summary>
+    /// <remarks>
+    /// http://reyntjes.blogspot.com/2009/04/master-detail-viewmodel_24.html
+    /// http://blogs.ugidotnet.org/bmatte/archive/2008/11/28/pattern-model-view-viewmodel-inotifypropertychanged-static-reflection-e-extension-methods.aspx
+    /// </remarks>
+    public static class PropertyExtensions
+    {
+        #region · Extension Methods ·
+
+        /// <summary>
+        /// Creates a <see cref="PropertyChangedEventArgs" /> instance for a given property.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="property">The property.</param>
+        /// <returns></returns>
+        public static PropertyChangedEventArgs CreateChangeEventArgs<T>(this Expression<Func<T>> property)
+        {
+            var expression  = property.Body as MemberExpression;
+            var member      = expression.Member;
+
+            return new PropertyChangedEventArgs(member.Name);
+        }
+
+        /// <summary>
+        /// Returns property name from expression
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="property"></param>
+        /// <returns></returns>
+        public static string GetPropertyName<T>(this Expression<Func<T>> property)
+        {
+            var expression = property.Body as MemberExpression;
+            
+            return expression.Member.Name;
+        }
+
+        /// <summary>
+        /// Return property name from expression.
+        /// </summary>
+        /// <example>
+        /// <![CDATA[
+        ///     Expression<Func<Item, object>> expression = i => i.Name;
+        ///     var propertyName = expression.GetPropertyName(); // propertyName = "Name"
+        /// ]]>
+        /// </example>
+        /// <typeparam name="T"></typeparam>
+        /// <typeparam name="TValue"></typeparam>
+        /// <param name="expression"></param>
+        /// <returns></returns>
+        public static string GetPropertyName<T, TValue>(this Expression<Func<T, TValue>> expression)
+        {
+            var lambda = expression as LambdaExpression;
+
+            MemberExpression memberExpression;
+
+            if (lambda.Body is UnaryExpression)
+            {
+                var unaryExpression = lambda.Body as UnaryExpression;
+                memberExpression = unaryExpression.Operand as MemberExpression;
+            }
+            else
+            {
+                memberExpression = lambda.Body as MemberExpression;
+            }
+
+            if (memberExpression != null)
+            {
+                return memberExpression.Member.Name;
+            }
+
+            return null;
+        }
+
+        #endregion
+    }
+}
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