diff --git a/Yavsc.Abstract/Constants.cs b/Yavsc.Abstract/Constants.cs
new file mode 100644
index 00000000..bc3f90ff
--- /dev/null
+++ b/Yavsc.Abstract/Constants.cs
@@ -0,0 +1,8 @@
+namespace Yavsc.Abstract
+{
+    public class ConstantsFromAbstract
+    {
+        public const string EMailRegexp = @"^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$";
+
+    }
+}
\ No newline at end of file