Base class and interface : interface « Class « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Class
3. interface

public class Component
{
    public Component() {}
}

interface Printable
{
    void printHeader(float factor);
    void printFooter(float factor);
}

public class TextField: Component, Printable
{
    public TextField(string text)
    {
        this.text = text;
    }
    // implementing Printable.printHeader()
    public void printHeader(float factor)
    {
        
    }
    
    // implementing Printable.printFooter()
    public void printFooter(float factor)
    {
        
    }
    
    private string text;
}

class MainClass
{
    public static void Main()
    {
        TextField text = new TextField("Hello");
        
        Printable scalable = (Printable) text;
        scalable.printHeader(0.5F);
        scalable.printFooter(0.5F);
    }
}