After stream demos (#80)

Author: csharpfritz

sessions/Season-05/0501-IntroToWinforms/README.md

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+# Session 0501 - Introduction to WinForms
+
+Let's learn a little about the history of Windows Forms, how you should get started with it today, and its purpose going forward.
+
+## WinForms History and Future
+
+### NETFX
+
+### NetCore 3+
+
+### The Future
+
+### Pros and Cons
+
+- Windows Only
+- With NetFx, all machines running Windows can run your app with minimal installation
+- Designer friendly: Easy to start putting controls on a form and provide immediate value
+- Battleship Gray FTW!
+- Event-driven application framework 
+
+## Building our first application - A Calculator
+
+### The default template
+
+### Visual Studio Designer and Toolbox
+
+- Properties box
+
+### Startup and Program.cs
+
+### The Form
+
+- Designer file
+- Title
+- Modal
+- 
+
+### Controls
+
+- Label
+- Textbox
+- Button
+
+### Control Docking
+
+### Event Handlers
+
+## Adding Style
+

sessions/Season-05/README.md

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+# Season 5 - Windows Application Development with Winforms and WPF
+
+In this season, we will look at the two technologies that have been predominantly used to build Windows applications over the last 20 years: Windows Forms and WPF.  Chances are, you are using a number of Windows Forms and WPF applications every day as these frameworks dominate the windows application space.
+

sessions/Season-05/src/MyApp/Form1.Designer.cs

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+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.Transactions;
+using System.Windows.Forms;
+
+namespace MyApp
+{
+
+	public partial class Form1 : Form
+	{
+
+		private decimal _Buffer = 0;
+		private char _Operation = ' ';
+
+		public Form1()
+		{
+			InitializeComponent();
+		}
+
+		private void NumberButton_Click(object sender, EventArgs e)
+		{
+
+			var button = sender as Button;
+
+			if (CalculatorScreen.Text == "0.")
+			{
+				CalculatorScreen.Text = button.Text;
+			}
+			else
+			{
+				CalculatorScreen.Text += button.Text;
+			}
+
+		}
+
+		private void button13_Click(object sender, EventArgs e)
+		{
+			
+			if (_Operation == ' ') {
+				_Operation = '+';
+				_Buffer = decimal.Parse(CalculatorScreen.Text);
+				CalculatorScreen.Text = "0.";
+			} else {
+
+				decimal currentValue = decimal.Parse(CalculatorScreen.Text);
+
+				CalculatorScreen.Text = _Operation switch
+				{
+					'+' => (_Buffer + currentValue).ToString(),
+					'-' => (_Buffer - currentValue).ToString(),
+					'x' => (_Buffer * currentValue).ToString(),
+					'/' => (_Buffer / currentValue).ToString(),
+					_ => "0."
+				};
+
+				_Buffer = 0;
+				_Operation = ' ';
+
+			}
+
+		}
+	}
+}