Added ShareActionProvider sample from ICS article.

ShareActionProviderDemo/Activity1.cs

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+using System;
+
+using Android.App;
+using Android.Content;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using Android.OS;
+using System.IO;
+
+namespace ShareActionProviderDemo
+{
+    [Activity (Label = "ShareActionProviderDemo", MainLauncher = true)]
+    public class Activity1 : Activity
+    {
+
+        protected override void OnCreate (Bundle bundle)
+        {
+            base.OnCreate (bundle);
+
+            CopyToPublic ("monkey.png");
+
+            // Set our view from the "main" layout resource
+            SetContentView (Resource.Layout.Main);
+        }
+
+        public override bool OnCreateOptionsMenu (IMenu menu)
+        {
+            MenuInflater.Inflate (Resource.Menu.ActionBarMenu, menu);        
+
+            var shareMenuItem = menu.FindItem (Resource.Id.shareMenuItem);            
+            var shareActionProvider = (ShareActionProvider)shareMenuItem.ActionProvider;
+            shareActionProvider.SetShareIntent (CreateIntent ());
+
+            var overflow_item = menu.FindItem (Resource.Id.overflowMenuItem);
+            var overflow_provider = (ShareActionProvider)overflow_item.ActionProvider;
+            overflow_provider.SetShareIntent (CreateIntent ());
+
+            return true;
+        }
+
+        Intent CreateIntent ()
+        {   
+            var sendPictureIntent = new Intent (Intent.ActionSend);
+            sendPictureIntent.SetType ("image/*");            
+            var uri = Android.Net.Uri.FromFile (GetFileStreamPath ("monkey.png"));           
+            sendPictureIntent.PutExtra (Intent.ExtraStream, uri);
+
+            return sendPictureIntent;
+        }
+
+        void CopyToPublic (String fileName)
+        {     
+            using (Stream fromStream = Assets.Open (fileName)) {
+
+                string filePath = Path.Combine (new string[]{"data", "data", PackageName, "files", fileName});
+
+                int size = 32 * 1024;
+
+                using (FileStream toStream = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite)) {
+
+                    int n = -1;
+                    byte[] buffer = new byte[size];
+
+                    while ((n = fromStream.Read(buffer, 0, size)) > 0) {
+                        toStream.Write (buffer, 0, n);
+                    }
+                }
+            }
+        }
+
+    }
+}

ShareActionProviderDemo/Assets/AboutAssets.txt

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+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with you package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+	protected override void OnCreate (Bundle bundle)
+	{
+		base.OnCreate (bundle);
+
+		InputStream input = Assets.Open ("my_asset.txt");
+	}
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");

ShareActionProviderDemo/Metadata.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<SampleMetadata>
+	<ID>3d5eb666-c03d-4390-93c3-6861e17f4ce4</ID>
+	<IsFullApplication>false</IsFullApplication>
+	<Level>Beginning</Level>
+	<Tags>User Interface, Shared Resources</Tags>
+</SampleMetadata>

ShareActionProviderDemo/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using Android.App;
+
+// Information about this assembly is defined by the following attributes. 
+// Change them to the values specific to your project.
+
+[assembly: AssemblyTitle("ShareActionProviderDemo")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("mike_bluestein")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
+// The form "{Major}.{Minor}.*" will automatically update the build and revision,
+// and "{Major}.{Minor}.{Build}.*" will update just the revision.
+
+[assembly: AssemblyVersion("1.0.0")]
+
+// The following attributes are used to specify the signing key for the assembly, 
+// if desired. See the Mono documentation for more information about signing.
+
+//[assembly: AssemblyDelaySign(false)]
+//[assembly: AssemblyKeyFile("")]
+

ShareActionProviderDemo/README.md

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+ShareActionProvider Demo
+========================
+
+This example shows how to use the ShareActionProvider to share an image using Ice Cream Sandwich.

ShareActionProviderDemo/Resources/AboutResources.txt

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+Images, layout descriptions, binary blobs and string dictionaries can be included 
+in your application as resource files.  Various Android APIs are designed to 
+operate on the resource IDs instead of dealing with images, strings or binary blobs 
+directly.
+
+For example, a sample Android app that contains a user interface layout (main.axml),
+an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png) 
+would keep its resources in the "Resources" directory of the application:
+
+Resources/
+    drawable/
+        icon.png
+
+    layout/
+        main.axml
+
+    values/
+        strings.xml
+
+In order to get the build system to recognize Android resources, set the build action to
+"AndroidResource".  The native Android APIs do not operate directly with filenames, but 
+instead operate on resource IDs.  When you compile an Android application that uses resources, 
+the build system will package the resources for distribution and generate a class called "R" 
+(this is an Android convention) that contains the tokens for each one of the resources 
+included. For example, for the above Resources layout, this is what the R class would expose:
+
+public class R {
+    public class drawable {
+        public const int icon = 0x123;
+    }
+
+    public class layout {
+        public const int main = 0x456;
+    }
+
+    public class strings {
+        public const int first_string = 0xabc;
+        public const int second_string = 0xbcd;
+    }
+}
+
+You would then use R.drawable.icon to reference the drawable/icon.png file, or R.layout.main 
+to reference the layout/main.axml file, or R.strings.first_string to reference the first 
+string in the dictionary file values/strings.xml.

ShareActionProviderDemo/Resources/layout/Main.axml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    >
+<TextView android:text="Click the device Menu button" 
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent" />
+</LinearLayout>
+

ShareActionProviderDemo/Resources/menu/ActionBarMenu.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:id="@+id/shareMenuItem"
+      android:showAsAction="always"
+      android:title="@string/sharePicture"
+      android:actionProviderClass="android.widget.ShareActionProvider" />
+
+  <item android:id="@+id/overflowMenuItem"
+      android:showAsAction="never"
+      android:title="@string/sharePicture"
+      android:actionProviderClass="android.widget.ShareActionProvider" />
+</menu>

ShareActionProviderDemo/Resources/values/Strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">ShareActionProviderDemo</string>
+    <string name="sharePicture">Share Picture</string>   
+</resources>

ShareActionProviderDemo/ShareActionProviderDemo.csproj

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+<?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)' == '' ">AnyCPU</Platform>
+    <ProductVersion>10.0.0</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{E010B79F-B465-49DE-84B5-647097FDB2BF}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Library</OutputType>
+    <RootNamespace>ShareActionProviderDemo</RootNamespace>
+    <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
+    <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
+    <AndroidResgenClass>Resource</AndroidResgenClass>
+    <AndroidApplication>True</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
+    <AssemblyName>ShareActionProviderDemo</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>none</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+    <AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
+    <AndroidLinkMode>SdkOnly</AndroidLinkMode>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="Mono.Android" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Activity1.cs" />
+    <Compile Include="Resources\Resource.designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\AboutResources.txt" />
+    <None Include="Assets\AboutAssets.txt" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\layout\Main.axml" />
+    <AndroidResource Include="Resources\values\Strings.xml" />
+    <AndroidResource Include="Resources\drawable\Icon.png" />
+    <AndroidResource Include="Resources\menu\ActionBarMenu.xml" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Novell\Novell.MonoDroid.CSharp.targets" />
+  <ItemGroup>
+    <Folder Include="Resources\menu\" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidAsset Include="Assets\monkey.png" />
+  </ItemGroup>
+</Project>

ShareActionProviderDemo/ShareActionProviderDemo.sln

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+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ShareActionProviderDemo", "ShareActionProviderDemo.csproj", "{E010B79F-B465-49DE-84B5-647097FDB2BF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{E010B79F-B465-49DE-84B5-647097FDB2BF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E010B79F-B465-49DE-84B5-647097FDB2BF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E010B79F-B465-49DE-84B5-647097FDB2BF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E010B79F-B465-49DE-84B5-647097FDB2BF}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(MonoDevelopProperties) = preSolution
+		StartupItem = ShareActionProviderDemo.csproj
+	EndGlobalSection
+EndGlobal