WinFormCreatedOnTheConsole_v1.3

// The example is from the book "Windows Forms in Action 2-nd edition 2012" coolcsn
// USE: csc /t:exe /out:MyForm.exe *.cs
// /main switch is used to determen which method is the entry point of the application
// /reference switch is used
// the reference switch can be used like this
// csc MyForm.cs /r:System.dll /r:System.Windows.Forms.dll /r:System.Drawing.dll
using System; // must be first
// for the controls you need to add another namespace
using System.Windows.Forms;

// for Bitmap
using System.Drawing;
/*
 using WFalias = System.Windows.Forms
 using MyAppAlias = System.Windows.Forms.Application
With these defined, we could write our Main method as:
 public static void Main()
 {
 WFalias.Application.EnableVisualStyles();
 MyAppAlias.Run(new MyForm());
 }
 */

// the program works without the following line
// The following line of the program simply sets the version number for the program to 1.0, matching the section number of the book.
// You can verify this by right-clicking the myform.exe file, selecting Properties, and then clicking the Version tab.
[assembly: System.Reflection.AssemblyVersion("1.3")]
namespace MyNamespace
{
    // System.Windows.Forms is the namespace
    // Form is the class
    class MyForm : System.Windows.Forms.Form
    {
        // lets create fields
        private Button btnLoad;
        private PictureBox pbxPhoto;

        // constructor
        public MyForm()
        {
            // set a property
            this.Text = "Hello Form";

            // 1. Create and configure a button
            btnLoad = new Button();
            btnLoad.Text = "&Load";
            btnLoad.Left = 10;
            btnLoad.Top = 10;

            //  defined internally by the .NET Framework as follows:
            // public delegate void EventHandler(object sender, EventArgs e);
            btnLoad.Click += new EventHandler(this.HandleLoadClick);

            // 2. Create and configure a picture box
            pbxPhoto = new PictureBox();

             pbxPhoto.BorderStyle =
             System.Windows.Forms.BorderStyle.Fixed3D;
             pbxPhoto.Width = this.Width / 2;
             pbxPhoto.Height = this.Height / 2;
             pbxPhoto.Left = (this.Width - pbxPhoto.Width) / 2;
             pbxPhoto.Top = (this.Height - pbxPhoto.Height) / 2;
             pbxPhoto.SizeMode = PictureBoxSizeMode.Zoom;

             // instance of the Control.ControlCollectionclass
             // 3. Add our new controls to the form
             this.Controls.Add(btnLoad);
             this.Controls.Add(pbxPhoto);
        }

        // the event handler
        private void HandleLoadClick(object sender, System.EventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Title = "Open Photo";
            dlg.Filter = "jpg files (*.jpg)|*.jpg|All files (*.*)|*.*";
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                // using System.Drawing;
                pbxPhoto.Image = new Bitmap(dlg.OpenFile());
            }
            dlg.Dispose();
        }

// If there are multiple Main methods in an assembly, the /main switch can
// be used to indicate which method should be used, or to specify an alternate method
// as the entry point.

// This line is required in Windows Forms applications,
// and indicates that the thread executing this method should use a singlethreaded
// apartment (STA) threading model.

        [System.STAThread] // - it works without this annotation also
        // we can use /main switch to the compiler to tell wich is the main method
        static void Main()
        {
            // System.Windows.Forms is the namespace
            // Application is the class
            // EnableVisualStyles() - static method
            // Enables visual styles for the application.
            // It still works even without this line of code
            System.Windows.Forms.Application.EnableVisualStyles();

            // Starts a standard message loop on the current thread. If a Form is given, also makes that form visible.
            //  wait for operating system messages
            System.Windows.Forms.Application.Run(new MyForm()); // this is blocking

            /* or you can explicitly create a context
            System.Windows.Forms.Application.EnableVisualStyles();
             System.Windows.Forms.Form f = new MyForm();
             System.Windows.Forms.ApplicationContext context
             = new System.Windows.Forms.ApplicationContext();
             context.MainForm = f;
             System.Windows.Forms.Application.Run(context);
            */

            Console.WriteLine("Hello World!"); // at the same time writes to the console after closing the
            // previous statemnet.
        }
    }
}