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I am trying to make a C# Windows form in Visual Studio so I can draw on the form (like a basic version of Microsoft Paint). I am working through an example in a C# 2012 book. I have written the code verbatim, but when I build and run the program, I cannot actually draw anything on the form. The code compiles successfully without any errors. Can anyone see where the code can be improved so that I can successfully draw on the form?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace paint3

public partial class Form1 : Form

 bool shouldPaint = false;

 public Form1() // constructor
 
 InitializeComponent();
 

 private void Form1_MouseDown(object sender, MouseEventArgs e)
 
 shouldPaint = true;
 

 private void Form1_MouseUp(object sender, MouseEventArgs e)
 
 shouldPaint = false;
 

 private void Form1_MouseMove(object sender, MouseEventArgs e)
 
 if (shouldPaint)
 
 using (Graphics graphics = CreateGraphics())
 
 graphics.FillEllipse(new SolidBrush(Color.BlueViolet), e.X, e.Y, 4, 4);
 
 
 

As far as Form1 is concerned, it's simply a blank form that is created when I click "New Windows Forms Application" in Visual Studio 2012. I haven't added any buttons, text boxes, or other controls to Form1.

 private void Form1_Paint(object sender, EventArgs e)
 
 if (shouldPaint)
 
 using (Graphics graphics = CreateGraphics())
 
 graphics.FillEllipse(new SolidBrush(Color.BlueViolet), e.X, e.Y, 4, 4);
 
 
 

I am trying to make a C# Windows form in Visual Studio so I can draw on the form (like a
basic version of Microsoft Paint). I am working through an example in
a C# 2012 book.

Alex Fr provided an excellent set of drawing tools in his DrawTools article and these tools serve as a basis for Draw Tool Redux.

You want to download this stuff its, check out a tool I recently wrote by adding to Draw Tool Redux:

The EyeDropper Colour Picker I got from http://www.codeproject.com/Articles/36540/Adobe-Eyedropper-Control

The Transparent Textbox I got from: http://www.codeproject.com/Articles/4390/AlphaBlendTextBox-A-transparent-translucent-textbo

Try the paint events for drawing. this will help you.
The link is just an example. you need to implement as per the requirements