System.Drawing.Image这一句是什么意思

System.Drawing.Image这一句是什么意思 System.Drawing.Image这句是什么意思? System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0,0,image.Width,image.Height),Color.Black,Color.DarkRed,1.2f,true); 关于c# using systemusing System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms; c#高手看看什么问题 using System; using System.Collections.Generic; using System.ComponentModel; usiusing System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; usi 摄氏温度和华氏温度之间的转换.using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace _11_1{public partial drawing 求0-100所有的质数用c#编写using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication2{ public partial class For could not detect which operating system is in this disc image.you will need to C#中System.Drawing.Size 如果是负数,其数学意义是什么? System SYSTEM. system system. system system 在C# 中要用System.Drawing 为什么要在引用里加using System.Drawing 啊?有哪位高手帮我解决一下吧,我对这个问题很迷惑!搞不明白为什么,先谢谢你们啦!