///
/// 验证邮箱
///
///
///
public static bool IsEmail ( string source )
{
	return Regex.IsMatch ( source, @"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$", RegexOptions.IgnoreCase );
}