--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Mapping/NullValueAttribute.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,41 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+namespace BLToolkit.Mapping
+{
+	[SuppressMessage("Microsoft.Performance", "CA1813:AvoidUnsealedAttributes")]
+	[AttributeUsage(
+		AttributeTargets.Class | AttributeTargets.Interface |
+		AttributeTargets.Property | AttributeTargets.Field | 
+		AttributeTargets.Enum,
+		AllowMultiple=true)]
+	public class NullValueAttribute : Attribute
+	{
+		public NullValueAttribute()
+		{
+		}
+
+		public NullValueAttribute(object value)
+		{
+			_value = value;
+		}
+
+		public NullValueAttribute(Type type, object value)
+		{
+			_type  = type;
+			_value = value;
+		}
+
+		private readonly object _value;
+		public           object  Value
+		{
+			get { return _value; }
+		}
+
+		private readonly Type _type;
+		public           Type  Type
+		{
+			get { return _type; }
+		}
+	}
+}