From 13dcfbbd2b6c350f76077ad0645cf2c7d83c884b Mon Sep 17 00:00:00 2001
From: Shannon <sdeminick@gmail.com>
Date: Fri, 11 Oct 2013 10:58:31 +1100
Subject: [PATCH] Fixes build - removes .net 4.5 reference of
 EmailAddressAttribute - we'll leave that in for v7 when targettng 4.5

---
 .../Security/Providers/MembersMembershipProvider.cs       | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/Umbraco.Web/Security/Providers/MembersMembershipProvider.cs b/src/Umbraco.Web/Security/Providers/MembersMembershipProvider.cs
index 811fc6be52..f423d95fbd 100644
--- a/src/Umbraco.Web/Security/Providers/MembersMembershipProvider.cs
+++ b/src/Umbraco.Web/Security/Providers/MembersMembershipProvider.cs
@@ -750,9 +750,11 @@ namespace Umbraco.Web.Security.Providers
 
         private bool IsEmaiValid(string email)
         {
-            var validator = new EmailAddressAttribute();
-
-            return validator.IsValid(email);
+            const string pattern = @"^(?!\.)(""([^""\r\\]|\\[""\r\\])*""|"
+                                   + @"([-a-z0-9!#$%&'*+/=?^_`{|}~]|(?<!\.)\.)*)(?<!\.)"
+                                   + @"@[a-z0-9][\w\.-]*[a-z0-9]\.[a-z][a-z\.]*[a-z]$";
+            
+            return Regex.IsMatch(email, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled);            
         }
         
         /// <summary>