Description: Draw a line chart, using the c# language in the Visual studio, do not use the controls, drawn directly!
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File list (Check if you may need any files):
折线图2-连数据库\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.exe
................\........................\...\.....\WindowsFormsApplication2.pdb
................\........................\...\.....\WindowsFormsApplication2.vshost.exe
................\........................\...\.....\WindowsFormsApplication2.vshost.exe.manifest
................\........................\Form1.cs
................\........................\Form1.Designer.cs
................\........................\Form1.resx
................\........................\obj\Debug\WindowsFormsApplication2.csproj.FileListAbsolute.txt
................\........................\...\.....\WindowsFormsApplication2.csproj.GenerateResource.Cache
................\........................\...\.....\WindowsFormsApplication2.exe
................\........................\...\.....\WindowsFormsApplication2.Form1.resources
................\........................\...\.....\WindowsFormsApplication2.pdb
................\........................\...\.....\WindowsFormsApplication2.Properties.Resources.resources
................\........................\Program.cs
................\........................\...perties\AssemblyInfo.cs
................\........................\..........\Resources.Designer.cs
................\........................\..........\Resources.resx
................\........................\..........\Settings.Designer.cs
................\........................\..........\Settings.settings
................\........................\WindowsFormsApplication2.csproj
................\WindowsFormsApplication2.sln
................\WindowsFormsApplication2.suo
................\........................\obj\Debug\TempPE
................\........................\bin\Debug
................\........................\obj\Debug
................\........................\bin
................\........................\obj
................\........................\Properties
................\WindowsFormsApplication2
折线图2-连数据库