Template Method Mode

Steps:

1. Create a template method in the parent class to complete consistent operations

2. Perform different operations on sub-classes

Code:

   ///     <Summary>  
  ///  Data Verification parent class
  ///     </Summary>  
    Public    Abstract     Class  Validation
{
  Public     Void  Valid (  String  Value ){
Console. writeline (  "  \ R \ n Verification Result: {0} \ r \ n  "  ,  This  . Isvald (value ));
}

 Protected     Virtual     Bool  Isvald (  String  Value ){
  Return     True  ;
}
} 

   ///     <Summary>  
 ///  Subclass: Numerical verification
  ///     </Summary>  
    Public     Class  Validbyint: Validation
{
  Protected     Override     Bool  Isvald ( String  Value)
{
  Try  
{
  Int  Number  =     Int  . Parse (value );  Return     True  ;
}
  Catch  
{
 Return     False  ;
}
}
} 

   ///     <Summary>  
  ///  Subclass: Gender Verification
  ///     </Summary>  
    Public    Class  Validbysex: Validation
{
  Protected     Override     Bool  Isvald (  String  Value)
{
  If  (Value  =     "  Male "     |  Value  =     "  Female  "  ){  Return     True  ;}
  Return     False  ;
}
} 

   ///   client call   
   Validation V1  =    New   validbyint (); 
 v1.valid ( "   male  "  ); 
 V1  =    New   validbysex (); 
 v1.valid ( "   male  "  ); 
 console. readkey ();