Basic BenchmarkDotNet support for Xamarin

.gitignore

@@ -56,3 +56,6 @@ src/BenchmarkDotNet/Disassemblers/net461/*
 # Cake
 tools/**
 .dotnet
+
+# Xamarin
+Resource.designer.cs

BenchmarkDotNet.Xamarin.sln

@@ -0,0 +1,125 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
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+EndProject
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+EndProject
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+EndProject
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+EndProject
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+EndProject
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+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|iPhone = Debug|iPhone
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
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+		Release|iPhone = Release|iPhone
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+	EndGlobalSection
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+		{0A63C8A0-F7EB-47D7-8057-0C87C77C02A4}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
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+		{0A63C8A0-F7EB-47D7-8057-0C87C77C02A4}.Release|iPhone.Build.0 = Release|iPhone
+		{0A63C8A0-F7EB-47D7-8057-0C87C77C02A4}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
+		{0A63C8A0-F7EB-47D7-8057-0C87C77C02A4}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
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+EndGlobal

docs/articles/samples/IntroXamarin.md

@@ -0,0 +1,29 @@
+---
+uid: BenchmarkDotNet.Samples.Xamarin
+---
+
+## Sample: IntroXamarin
+
+To use BenchmarkDotNet with Xamarin, you will need to build a small UI for running Benchmarks and displaying the results so you can actually read them.
+Using [Xamarin.Forms](https://dotnet.microsoft.com/apps/xamarin/xamarin-forms) is a simple way to be able to run your benchmarks on iOS or Android.
+
+Other notes:
+
+* Use `Release` builds when running actual benchmarks.
+* Disable the linker via the `Don't Link` or `None`.
+
+### Source code
+
+[!code-csharp[MainPage.xaml.cs](../../../samples/BenchmarkDotNet.Samples.Forms/MainPage.xaml.cs)]
+
+### Output
+
+![Xamarin Output](../../images/xamarin-screenshot.png)
+
+### Links
+
+* [Xamarin.Android linker settings](https://docs.microsoft.com/xamarin/android/deploy-test/linker#linker-behavior)
+* [Xamarin.iOS linker settings](https://docs.microsoft.com/xamarin/ios/deploy-test/linker#dont-link)
+* The permanent link to this sample: @BenchmarkDotNet.Samples.Xamarin
+
+---

samples/BenchmarkDotNet.Samples.Android/BenchmarkDotNet.Samples.Android.csproj

@@ -0,0 +1,97 @@
+<?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>
+    <ProjectGuid>{F8547E13-AE77-44CC-9F1D-1717921C4B86}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{c9e5eea5-ca05-42a1-839b-61506e0a37df}</TemplateGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>BenchmarkDotNet.Samples.Forms.Droid</RootNamespace>
+    <AssemblyName>BenchmarkDotNet.Samples.Forms.Android</AssemblyName>
+    <AndroidApplication>True</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
+    <AndroidResgenClass>Resource</AndroidResgenClass>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+    <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
+    <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
+    <AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
+    <TargetFrameworkVersion>v9.0</TargetFrameworkVersion>
+    <AndroidEnableSGenConcurrent>true</AndroidEnableSGenConcurrent>
+    <AndroidUseAapt2>true</AndroidUseAapt2>
+    <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidManagedSymbols>true</AndroidManagedSymbols>
+    <AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
+    <AndroidSupportedAbis>armeabi-v7a;x86;x86_64;arm64-v8a</AndroidSupportedAbis>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="4.5.0.530" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.5.2" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainActivity.cs" />
+    <Compile Include="Resources\Resource.designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Properties\AndroidManifest.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\layout\Tabbar.xml" />
+    <AndroidResource Include="Resources\layout\Toolbar.xml" />
+    <AndroidResource Include="Resources\values\styles.xml" />
+    <AndroidResource Include="Resources\values\colors.xml" />
+    <AndroidResource Include="Resources\mipmap-anydpi-v26\icon.xml" />
+    <AndroidResource Include="Resources\mipmap-anydpi-v26\icon_round.xml" />
+    <AndroidResource Include="Resources\mipmap-hdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-hdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-mdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-mdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xxhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xxhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xxxhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xxxhdpi\launcher_foreground.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Resources\drawable\" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\BenchmarkDotNet.Samples.Forms\BenchmarkDotNet.Samples.Forms.csproj">
+      <Project>{EF54613D-8A3D-42DB-BF98-AD95C582FEF3}</Project>
+      <Name>BenchmarkDotNet.Samples.Forms</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+</Project>

samples/BenchmarkDotNet.Samples.Android/MainActivity.cs

@@ -0,0 +1,33 @@
+using System;
+
+using Android.App;
+using Android.Content.PM;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using Android.OS;
+
+namespace BenchmarkDotNet.Samples.Forms.Droid
+{
+    [Activity(Label = "BenchmarkDotNet.Samples.Forms", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
+    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
+    {
+        protected override void OnCreate(Bundle savedInstanceState)
+        {
+            TabLayoutResource = Resource.Layout.Tabbar;
+            ToolbarResource = Resource.Layout.Toolbar;
+
+            base.OnCreate(savedInstanceState);
+
+            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
+            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
+            LoadApplication(new App());
+        }
+        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
+        {
+            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+
+            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+        }
+    }
+}

samples/BenchmarkDotNet.Samples.Android/Properties/AndroidManifest.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.benchmarkdotnet.samples">
+    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
+    <application android:label="BenchmarkDotNet.Samples.Android"></application>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+</manifest>

samples/BenchmarkDotNet.Samples.Android/Properties/AssemblyInfo.cs

@@ -0,0 +1,34 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// 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("BenchmarkDotNet.Samples.Forms.Android")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("BenchmarkDotNet.Samples.Forms.Android")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+
+// 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")]
+
+// Add some common permissions, these can be removed if not needed
+[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]

samples/BenchmarkDotNet.Samples.Android/Resources/layout/Tabbar.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/sliding_tabs"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    app:tabIndicatorColor="@android:color/white"
+    app:tabGravity="fill"
+    app:tabMode="fixed" />

samples/BenchmarkDotNet.Samples.Android/Resources/layout/Toolbar.xml

@@ -0,0 +1,9 @@
+<android.support.v7.widget.Toolbar
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/toolbar"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    android:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
+