C # adapter Mode

Structure:

Interface classes that customers can connect:Copy codeThe Code is as follows: class Target
{
Public virtual void Request ()
{
Console. WriteLine ("common request! ");
}
}

Interfaces that customers can use only by using the adapter:Copy codeThe Code is as follows: class Adaptee
{
Public void SpecialRequest ()
{
Console. WriteLine ("special request! ");
}
}

Adapter definition: inheritance and Target classCopy codeThe Code is as follows: class Adapter: Target
{
Adaptee ad = new Adaptee ();
Public override void Request ()
{
Ad. SpecialRequest ();
}
}

Main function call:Copy codeThe Code is as follows: class Program
{
Static void Main (string [] args)
{
Target ta = new Target ();
Ta. Request ();
Target sta = new Adapter ();
Sta. Request ();
Console. ReadKey ();
}
}

APIS that are not available in the past can be used after the adapter is used.