C# uses the DrawLine object to draw a straight line, draw horizontal and vertical lines, click the corresponding button, you can call the DrawLine method to draw a straight line, a fixed pattern, there is no difficulty, C# Beginner Novice reference would be good to learn a little graphics rendering aspects Basics

AboutDrawLine\AboutDrawLine\AboutDrawLine.csproj
.............\.............\Form1.cs
.............\.............\Form1.designer.cs
.............\.............\Form1.resx
.............\.............\Program.cs
.............\.............\...perties\AssemblyInfo.cs
.............\.............\..........\Resources.Designer.cs
.............\.............\..........\Resources.resx
.............\.............\..........\Settings.Designer.cs
.............\.............\..........\Settings.settings
.............\AboutDrawLine.sln
.............\AboutDrawLine.suo
.............\.............\Properties
.............\AboutDrawLine
AboutDrawLine

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