Adding all the conceptual samples.

ButtonEventDemo/ButtonEventDemo.sln

@@ -0,0 +1,26 @@
+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ButtonEventDemo", "ButtonEventDemo\ButtonEventDemo.csproj", "{F550B84D-C304-4413-9A05-A85832245AA5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+		Debug|iPhone = Debug|iPhone
+		Release|iPhone = Release|iPhone
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Debug|iPhone.ActiveCfg = Debug|iPhone
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Debug|iPhone.Build.0 = Debug|iPhone
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Release|iPhone.ActiveCfg = Release|iPhone
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Release|iPhone.Build.0 = Release|iPhone
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
+		{F550B84D-C304-4413-9A05-A85832245AA5}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
+	EndGlobalSection
+	GlobalSection(MonoDevelopProperties) = preSolution
+		StartupItem = ButtonEventDemo\ButtonEventDemo.csproj
+	EndGlobalSection
+EndGlobal

ButtonEventDemo/ButtonEventDemo/AppDelegate.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using MonoTouch.Foundation;
+using MonoTouch.UIKit;
+
+namespace ButtonEventDemo
+{
+    // The UIApplicationDelegate for the application. This class is responsible for launching the 
+    // User Interface of the application, as well as listening (and optionally responding) to 
+    // application events from iOS.
+    [Register ("AppDelegate")]
+ public partial class AppDelegate : UIApplicationDelegate
+    {
+        // class-level declarations
+        UIWindow window;
+        ButtonEventDemoViewController viewController;
+
+        //
+        // This method is invoked when the application has loaded and is ready to run. In this 
+        // method you should instantiate the window, load the UI into it and then make the window
+        // visible.
+        //
+        // You have 17 seconds to return from this method, or iOS will terminate your application.
+        //
+        public override bool FinishedLaunching (UIApplication app, NSDictionary options)
+        {
+            window = new UIWindow (UIScreen.MainScreen.Bounds);
+
+            viewController = new ButtonEventDemoViewController ("ButtonEventDemoViewController", null);
+            window.RootViewController = viewController;
+            window.MakeKeyAndVisible ();
+
+            return true;
+        }
+
+    }
+}

ButtonEventDemo/ButtonEventDemo/ButtonEventDemo.csproj

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">iPhoneSimulator</Platform>
+    <ProductVersion>10.0.0</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{F550B84D-C304-4413-9A05-A85832245AA5}</ProjectGuid>
+    <ProjectTypeGuids>{6BC8ED88-2882-458C-8E55-DFD12B67127B};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>ButtonEventDemo</RootNamespace>
+    <AssemblyName>ButtonEventDemo</AssemblyName>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchLink>None</MtouchLink>
+    <MtouchDebug>true</MtouchDebug>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
+    <DebugType>none</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchLink>None</MtouchLink>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhone\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <MtouchDebug>true</MtouchDebug>
+    <CodesignKey>iPhone Developer</CodesignKey>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
+    <DebugType>none</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhone\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <CodesignKey>iPhone Developer</CodesignKey>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="monotouch" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Info.plist" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Main.cs" />
+    <Compile Include="AppDelegate.cs" />
+    <Compile Include="ButtonEventDemoViewController.cs" />
+    <Compile Include="ButtonEventDemoViewController.designer.cs">
+      <DependentUpon>ButtonEventDemoViewController.cs</DependentUpon>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <InterfaceDefinition Include="ButtonEventDemoViewController.xib" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+</Project>

ButtonEventDemo/ButtonEventDemo/ButtonEventDemoViewController.cs

@@ -0,0 +1,61 @@
+using MonoTouch.UIKit;
+using System.Drawing;
+using System;
+using MonoTouch.Foundation;
+
+namespace ButtonEventDemo
+{
+    public partial class ButtonEventDemoViewController : UIViewController
+    {
+        public ButtonEventDemoViewController (string nibName, NSBundle bundle) : base (nibName, bundle)
+        {
+        }
+
+        public override void DidReceiveMemoryWarning ()
+        {
+            // Releases the view if it doesn't have a superview.
+            base.DidReceiveMemoryWarning ();
+
+            // Release any cached data, images, etc that aren't in use.
+        }
+
+        public override void ViewDidLoad ()
+        {
+            base.ViewDidLoad ();
+
+            //Here we register for the TouchUpInside event using an outlet to
+            //the UIButton created in Interface Builder. Also see the target-action
+            //approach for accomplishing the same thing below.
+            aButton.TouchUpInside += (o,s) => {
+                Console.WriteLine ("button touched"); }; 
+
+            //You could also use a C# 2.0 style anonymous function
+//            aButton.TouchUpInside += delegate {
+//                Console.WriteLine ("button touched");         
+//            };
+
+        }
+
+        public override void ViewDidUnload ()
+        {
+            base.ViewDidUnload ();
+
+            aButton = null;
+        }
+
+        public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
+        {
+            // Return true for supported orientations
+            return (toInterfaceOrientation != UIInterfaceOrientation.PortraitUpsideDown);
+        }
+
+        //This is an action method connected to the TouchUpInside event
+        //of a UIButton. The action is connected via Interface Builder
+        //The same thing can be accomplished with a .NET event registered
+        //to the UIButton in code, as we do in the ViewDidLoad method above.
+        partial void HandleButtonTouch (NSObject sender)
+        {
+            Console.WriteLine ("button touched");
+        }
+    }
+}