--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Mapping/MemberMappers/TimeSpanBigIntMapper.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,22 @@
+using System;
+using System.IO;
+using System.Runtime.Serialization.Formatters.Binary;
+
+namespace BLToolkit.Mapping.MemberMappers
+{
+    public class TimeSpanBigIntMapper : MemberMapper
+    {
+        public override void SetValue(object o, object value)
+        {
+            if (value != null) this.MemberAccessor.SetValue(o, new TimeSpan((long)value));                                
+        }
+
+        public override object GetValue(object o)
+        {
+            var val = this.MemberAccessor.GetValue(o);
+            if (val != null)
+                return ((TimeSpan) val).Ticks;
+            return null;                        
+        }                
+    }
+}