Many more samples :-)

Button/Button.cs

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+using System;
+
+using Android.App;
+using Android.OS;
+using Android.Runtime;
+
+namespace Mono.Samples.Button
+{
+	public class ButtonActivity : Activity
+	{
+		int count = 0;
+
+		public ButtonActivity (IntPtr handle) : base (handle)
+		{
+		}
+
+		protected override void OnCreate (Bundle bundle)
+		{
+#if MONODROID_TIMING
+			Logger.Log(LogLevel.Info, "MonoDroid-Timing", "ButtonActivity.OnCreate: time: " + (DateTime.Now - new DateTime (1970, 1, 1)).TotalMilliseconds);
+#endif
+			base.OnCreate (bundle);
+
+			// Create your application here
+			Android.Widget.Button button = new Android.Widget.Button (this);
+
+			button.Text = string.Format ("{0} clicks!!", count);
+			button.Click += delegate { button.Text = string.Format ("{0} clicks!!", ++count); };
+
+			SetContentView (button);
+		}
+	}
+}
+

Button/DroidButton.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{CB69577F-1797-4ADD-8A24-9079679D8FC3}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>DroidButton</RootNamespace>
+    <AssemblyName>DroidButton</AssemblyName>
+    <FileAlignment>512</FileAlignment>
+    <AndroidResgenFile>R.cs</AndroidResgenFile>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Button.cs" />
+    <Compile Include="R.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Novell\Novell.MonoDroid.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

Button/DroidButton.sln

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+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DroidButton", "DroidButton.csproj", "{CB69577F-1797-4ADD-8A24-9079679D8FC3}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{CB69577F-1797-4ADD-8A24-9079679D8FC3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CB69577F-1797-4ADD-8A24-9079679D8FC3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CB69577F-1797-4ADD-8A24-9079679D8FC3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CB69577F-1797-4ADD-8A24-9079679D8FC3}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Button/Makefile

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+PROJ=DroidButton.csproj
+
+include ../xbuild.make

Button/Properties/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="mono.samples.button">
+</manifest>

Button/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle ("DroidButton")]
+[assembly: AssemblyDescription ("")]
+[assembly: AssemblyConfiguration ("")]
+[assembly: AssemblyCompany ("Novell")]
+[assembly: AssemblyProduct ("DroidButton")]
+[assembly: AssemblyCopyright ("Copyright © Novell 2010")]
+[assembly: AssemblyTrademark ("")]
+[assembly: AssemblyCulture ("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible (false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid ("a557ce8c-9dbe-4b93-8fc4-95ffc126cf14")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion ("1.0.0.0")]
+[assembly: AssemblyFileVersion ("1.0.0.0")]

Hello/Hello.cs

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+#define CATCH
+using System;
+
+using Android.App;
+using Android.OS;
+using Android.Widget;
+using Android.Runtime;
+using Android.Views;
+using Javax.Net;
+using Javax.Microedition.Khronos.Egl;
+
+namespace Mono.Samples.Hello
+{
+	public class HelloActivity : Activity, View.IOnTouchListener
+	{
+		TextView textview;
+
+		public HelloActivity (IntPtr handle) : base (handle)
+		{
+		}
+
+		protected override void OnCreate (Bundle bundle)
+		{
+#if MONODROID_TIMING
+			Logger.Log(LogLevel.Info, "MonoDroid-Timing", "HelloActivity.OnCreate: time: " + (DateTime.Now - new DateTime (1970, 1, 1)).TotalMilliseconds);
+#endif
+			base.OnCreate (bundle);
+
+			textview = new TextView (this);
+			textview.Text = "Hello MonoDroid.  Mono loves you.\n\nEmbedded\u0000Nulls";
+
+			// Sanity checking to ensure that our binding stays correct.
+			var v = ServerSocketFactory.Default;
+			Logger.Log(LogLevel.Info, "HelloApp", "ServerSocketFactory.Default=" + v);
+			var egl = EGLContext.EGL;
+			Logger.Log(LogLevel.Info, "HelloApp", "EGLContext.EGL=" + egl);
+			IEGL10 egl10 = egl.JavaCast<IEGL10>();
+			Logger.Log(LogLevel.Info, "HelloApp", "(IEGL10) EGLContext.EGL=" + egl10.GetType().FullName);
+
+			var list = new Java.Util.ArrayList<string>();
+			Java.Util.IIterator<string> iterator = list.Iterator ();
+
+#if CATCH
+			try {
+#endif
+				Logger.Log (LogLevel.Info, "HelloApp", "calling setDefaultKeyMode...");
+				// NOTE: calling base.SetDefaultKeyMode() causes the app to exit
+				// unexpectedly when the Home button is pressed.
+				// this is NOT a MonoDroid bug; the equivalent Java behaves the same.
+				base.SetDefaultKeyMode (-100);
+				Logger.Log (LogLevel.Info, "HelloApp", "after setDefaultKeyMode...");
+#if CATCH
+			}
+			catch (Exception e) {
+				Logger.Log (LogLevel.Info, "HelloApp", "Yay, exception caught!" + e);
+				textview.Text += "\n\nEXPECTED EXCEPTION:\n" + e.ToString ();
+			}
+#endif
+
+			SetContentView (textview);
+			textview.SetOnTouchListener (this);
+		}
+
+		public bool OnTouch (View v, MotionEvent e)
+		{
+			Logger.Log(LogLevel.Info, "HelloApp", "OnTouchListener.OnTouch: v=" + v + "; e=" + e);
+			return false;
+		}
+	}
+}
+

Hello/Hello.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{73A74ADF-6308-42A0-8BA6-2B5D53238546}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Hello</RootNamespace>
+    <AssemblyName>Hello</AssemblyName>
+    <FileAlignment>512</FileAlignment>
+    <AndroidResgenFile>R.cs</AndroidResgenFile>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;MONODROID_TIMING</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE;MONODROID_TIMING</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Hello.cs" />
+    <Compile Include="R.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Novell\Novell.MonoDroid.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

Hello/Hello.sln

@@ -0,0 +1,20 @@
+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Hello", "Hello.csproj", "{73A74ADF-6308-42A0-8BA6-2B5D53238546}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{73A74ADF-6308-42A0-8BA6-2B5D53238546}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{73A74ADF-6308-42A0-8BA6-2B5D53238546}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{73A74ADF-6308-42A0-8BA6-2B5D53238546}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{73A74ADF-6308-42A0-8BA6-2B5D53238546}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Hello/Makefile

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+PROJ=Hello.csproj
+
+include ../xbuild.make

Hello/Properties/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="mono.samples.hello">
+</manifest>

Hello/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle ("Hello")]
+[assembly: AssemblyDescription ("")]
+[assembly: AssemblyConfiguration ("")]
+[assembly: AssemblyCompany ("Novell")]
+[assembly: AssemblyProduct ("Hello")]
+[assembly: AssemblyCopyright ("Copyright © Novell 2010")]
+[assembly: AssemblyTrademark ("")]
+[assembly: AssemblyCulture ("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible (false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid ("a557ce8c-9dbe-4b93-8fc4-95ffc126cf14")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion ("1.0.0.0")]
+[assembly: AssemblyFileVersion ("1.0.0.0")]

HelloWorld/HelloWorld.cs

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+using System;
+
+using Android.App;
+using Android.OS;
+
+namespace Mono.Samples.HelloWorld
+{
+	public class HelloAndroid : Activity
+	{
+
+		public HelloAndroid (IntPtr handle) : base (handle)
+		{
+		}
+
+		protected override void OnCreate (Bundle savedInstanceState)
+		{
+			base.OnCreate (savedInstanceState);
+
+			SetContentView (R.layout.main);
+		}
+	}
+}