--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Validation/ValidatorBaseAttribute.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,69 @@
+using System;
+using System.Reflection;
+using System.ComponentModel;
+
+namespace BLToolkit.Validation
+{
+	public abstract class ValidatorBaseAttribute : Attribute
+	{
+		protected ValidatorBaseAttribute()
+		{
+		}
+
+		protected ValidatorBaseAttribute(string errorMessage)
+		{
+			_errorMessage = errorMessage;
+		}
+
+		private        string _errorMessage;
+		public virtual string  ErrorMessage
+		{
+			get { return _errorMessage;  }
+			set { _errorMessage = value; }
+		}
+
+		public abstract bool IsValid(ValidationContext context);
+
+		public virtual string GetErrorMessage(ValidationContext context)
+		{
+			return string.Format(ErrorMessage, GetPropertyFriendlyName(context));
+		}
+
+		protected virtual string GetPropertyFriendlyName(ValidationContext context)
+		{
+			MemberInfo mi        = context.MemberInfo;
+			string     className = mi.DeclaringType.Name;
+			string     fieldName = mi.Name;
+
+			// Get class name.
+			//
+			object[] attrs = mi.DeclaringType.GetCustomAttributes(typeof(FriendlyNameAttribute), true);
+
+			if (attrs.Length > 0)
+				className = ((FriendlyNameAttribute)attrs[0]).Name;
+			else
+			{
+				attrs = mi.DeclaringType.GetCustomAttributes(typeof(DisplayNameAttribute), true);
+
+				if (attrs.Length > 0)
+					className = ((DisplayNameAttribute)attrs[0]).DisplayName;
+			}
+
+			// Get field name.
+			//
+			attrs = mi.GetCustomAttributes(typeof(FriendlyNameAttribute), true);
+
+			if (attrs.Length > 0)
+				fieldName = ((FriendlyNameAttribute)attrs[0]).Name;
+			else
+			{
+				attrs = mi.GetCustomAttributes(typeof(DisplayNameAttribute), true);
+
+				if (attrs.Length > 0)
+					fieldName = ((DisplayNameAttribute)attrs[0]).DisplayName;
+			}
+
+			return string.IsNullOrEmpty(className)? fieldName: className + "." + fieldName;
+		}
+	}
+}