regular expression for email address validation

hi use this regular expression for email address validation
^[A-Za-z0-9](([_.-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([.-]?[a-zA-Z0-9]+)*).([A-Za-z]{2,})$

Regular expression validator in asp.net would be like

Chears…