Add project files.

Esiur/Resource/ResourceProperty.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Esiur.Resource
+{
+
+    [AttributeUsage(AttributeTargets.Property)]
+    public class ResourceProperty : System.Attribute
+    {
+        string readExpansion;
+        string writeExpansion;
+
+
+        public string ReadExpansion
+        {
+            get
+            {
+                return readExpansion;
+            }
+        }
+
+        public string WriteExpansion
+        {
+            get
+            {
+                return writeExpansion;
+            }
+        }
+
+        public ResourceProperty(string readExpansion = null, string writeExpansion = null)
+        {
+            this.readExpansion = readExpansion;
+            this.writeExpansion = writeExpansion;
+        }
+    }
+}