public static IAsyncResult BeginValidate(Address address, AsyncCallback callback)
 {
     SmtpValidator._delegateValidateAddress = SmtpValidator.Validate;
     return SmtpValidator._delegateValidateAddress.BeginInvoke(address, callback, SmtpValidator._delegateValidateAddress);
 }
 public static IAsyncResult BeginValidate(Address address, AsyncCallback callback)
 {
     _delegateValidateAddress = Validate;
     return(_delegateValidateAddress.BeginInvoke(address, callback, _delegateValidateAddress));
 }
 public static IAsyncResult BeginValidate(Address address, AsyncCallback callback)
 {
     SmtpValidator._delegateValidateAddress = SmtpValidator.Validate;
     return(SmtpValidator._delegateValidateAddress.BeginInvoke(address, callback, SmtpValidator._delegateValidateAddress));
 }