--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UnitTests/CS/Validation/NullValue.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,56 @@
+using System;
+using BLToolkit.EditableObjects;
+using BLToolkit.Reflection;
+using NUnit.Framework;
+
+using BLToolkit.Validation;
+using BLToolkit.Mapping;
+
+namespace Validation
+{
+	[TestFixture]
+	public class NullValue
+	{
+		public class Entity : EditableObject
+		{
+			private byte timeStart;
+
+			[Required("Time Start is required")]
+			[NullValue(typeof(byte), 99)]
+			public byte TimeStart
+			{
+				get { return timeStart;  }
+				set { timeStart = value; }
+			}
+		}
+
+		[Test]
+		public void Test()
+		{
+			Entity test = new Entity();
+
+			test.TimeStart = 0;
+			test.Validate();
+		}
+
+		public abstract class PersonDoc : EditableObject
+		{
+			[MapField("Series_PersonDoc"), MaxLength(50), Required]
+			public abstract string Series_PersonDoc { get; set; }
+
+			[MapField("BegDate_PersonDoc"), Required]
+			[NullDateTime()]
+			public abstract DateTime BegDate_PersonDoc { get; set; }
+		}
+
+
+		[Test, ExpectedException(typeof(ValidationException))]
+		public void Test2()
+		{
+			PersonDoc doc = TypeAccessor<PersonDoc>.CreateInstance();
+
+			doc.Series_PersonDoc = "PersonDoc";
+			doc.Validate();
+		}
+	}
+}