Point in System.Windows

[mohammadbaldwin121]

In the book "Programming C# 4.0", the type Point is declared in System.Windows, but the Visual Studio Express 2010 compiler consider it to be an error.
The code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;

class Firefighter
{
public string Name { get; set; }
public void ExtinguishFire()
{
Console.WriteLine("{0} is putting out the fire!", Name);
}
public void Drive(Firetruck truckToDrive, Point coordinates)
{
if (truckToDrive.Driver != this)
{
return;
}
truckToDrive.Drive(coordinates);
}

This is the message
Error 1 The type or namespace name 'Windows' does not exist in the namespace 'System' (are you missing an assembly reference?)
Error 2 The type or namespace name 'Point' could not be found (are you missing a using directive or an assembly reference?)

 

[JohnH]

System.Windows is used in WPF applications, or as documentation says System.Windows Namespaces

The System.Windows namespaces contain types used in Windows Presentation Foundation (WPF) applications,

 

[jmcilhinney]

If you are creating a Windows Forms application then you would use the System.Drawing.Point structure.