名稱空間中不存在點System.Drawing

Question

我是C＃的新手，並嘗試從教程運行示例C＃程序。

當我嘗試運行下面的代碼，我得到了以下錯誤：

Error 1 The type or namespace name 'Point' does not exist in the namespace 'System.Drawing' (are you missing an assembly reference?) C:\Users\Documents\Visual Studio 2012\Projects\HelloWorld\HelloWorld\Class1.cs 20 28 HelloWorld

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Drawing; 

namespace HelloWorld 
{ 
    class Hello 
    { 
     static void Main() 
     { 
      Nullable<bool> b = false; 
      if (b.HasValue) Console.WriteLine("b is {0}", b.Value); 
      else Console.WriteLine("b is not set"); 

      System.Drawing.Point p = new System.Drawing.Point(20, 30); 

      Console.WriteLine(b); 
      Console.WriteLine("Hello World"); 
      Console.WriteLine("Press any key to exit"); 

      Console.ReadKey(); 
     } 
    } 
} 

Answer 1

在您的Solution Explorer中右鍵點擊引用點擊添加引用單擊.net選項卡上，滾動到System.Drawing 。它應該工作。