'Imports System.Text.RegularExpressions

'Public Class Validaciones
'    Public Shared Function EsEmail(ByVal email As String) As Boolean
'        Static emailExpression As New Regex("^[_a-z0-9-]+(.[a-z0-9-]+)@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,4})$")
'        Return emailExpression.IsMatch(email)
'    End Function
'End Class