PropertySet - rename and refactor

src/Umbraco.Core/Models/PublishedContent/PropertySetWrapped.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+
+namespace Umbraco.Core.Models.PublishedContent
+{
+    /// <summary>
+    /// Provides an abstract base class for <c>IPropertySet</c> implementations that
+    /// wrap and extend another <c>IPropertySet</c>.
+    /// </summary>
+    public abstract class PropertySetWrapped : IPropertySet
+    {
+        protected readonly IPropertySet Content;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PropertySetWrapped"/> class
+        /// with an <c>IPropertySet<c> instance to wrap.</c>
+        /// </summary>
+        /// <param name="content">The content to wrap.</param>
+        protected PropertySetWrapped(IPropertySet content)
+        {
+            Content = content;
+        }
+
+        /// <summary>
+        /// Gets the wrapped content.
+        /// </summary>
+        /// <returns>The wrapped content, that was passed as an argument to the constructor.</returns>
+        public IPropertySet Unwrap() => Content;
+
+        /// <inheritdoc />
+        public PublishedContentType ContentType => Content.ContentType;
+
+        /// <inheritdoc />
+        public Guid Key => Content.Key;
+
+        /// <inheritdoc />
+        public IEnumerable<IPublishedProperty> Properties => Content.Properties;
+
+        /// <inheritdoc />
+        public IPublishedProperty GetProperty(string alias) => Content.GetProperty(alias);
+    }
+}