added marr.datamapper source code for easy debugging.

Marr.Data/UnitOfWorkSharedContext.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Marr.Data
+{
+    /// <summary>
+    /// Works in conjunction with the UnitOfWork to create a new 
+    /// shared context that will preserve a single IDataMapper.
+    /// </summary>
+    public class UnitOfWorkSharedContext : IDisposable
+    {
+        private UnitOfWork _mgr;
+        private bool _isParentContext;
+
+        public UnitOfWorkSharedContext(UnitOfWork mgr)
+        {
+            _mgr = mgr;
+
+            if (_mgr.IsShared)
+            {
+                _isParentContext = false;
+            }
+            else
+            {
+                _isParentContext = true;
+                _mgr.IsShared = true;
+            }
+        }
+
+        public void Dispose()
+        {
+            if (_isParentContext)
+            {
+                _mgr.IsShared = false;
+                _mgr.Dispose();
+            }
+        }
+    }
+}