c_sharp中using system.linq表示什么?

c_sharp中using system.linq表示什么? using System; using System.Data; using System.Configuration; using System.Linq; using System.Web; u提示“system”中不存在类型或命名空间名称‘Ling’（缺少程序集引用吗?） using System; using System.Collections.Generic; using System.Linq; using System.Text; using System. using System; using System.Collections; using System.Configuration; using System.Data; using System.using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using C#中using System.Diagnostics;怎么产生如题 using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Cons using System.Linq 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; 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 The method was developed using a representative system.句中using是什么成分? 有无语法错误,帮我改改谢谢using System;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using Sys 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 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 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 using System; using System.Collections.Generic; using System.Windows.Forms; namespace gxz { static using System;using System.Collections.Generic;using System.Windows.Forms;namespace gxz{static class Program{/// /// 应用程序的主入口点./// [ST using System.Data.SqlClient;的真实含义? 求大神帮下忙,这个错哪里了呀,怎么修改using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace hanshu2{ class Program { static void MaxValue(int[] intArray,ou 帮我注释一下每行代码,就是解释下每行的意思,谢谢了using System;using System.Globalization;using System.Text.RegularExpressions;using System.Windows.Forms; namespace Text{ public partial class Form1 : Form { private s