Athena (from https://comparers.codeplex.com/)

.gitignore

@@ -5,6 +5,7 @@
 *.suo
 *.user
 *.sln.docstates
+.localhistory/
 
 # Build results
 [Dd]ebug/
@@ -15,6 +16,7 @@ build/
 bld/
 [Bb]in/
 [Oo]bj/
+*.nupkg
 
 # MSTest test Results
 [Tt]est[Rr]esult*/

Source/Build.ps1

@@ -0,0 +1,13 @@
+$ErrorActionPreference = "Stop"
+
+# Build solution
+$project = get-project
+$build = $project.DTE.Solution.SolutionBuild
+$oldConfiguration = $build.ActiveConfiguration
+$build.SolutionConfigurations.Item("Release").Activate()
+$build.Build($true)
+$oldConfiguration.Activate()
+
+nuget pack -Symbols "Comparers\Comparers (NET4).csproj" -Prop Configuration=Release
+nuget pack -Symbols "Comparers.Ix (NET45, Win8, WP8)\Comparers.Ix (NET45, Win8, WP8).csproj" -Prop Configuration=Release
+nuget pack -Symbols "Comparers.Rx (NET4, Win8, SL5, WP8)\Comparers.Rx (NET4, Win8, SL5, WP8).csproj" -Prop Configuration=Release

Source/Comparers (NET4, Win8, SL4, WP7, XBox)/Comparers (NET4, Win8, SL4, WP7, XBox).csproj

@@ -0,0 +1,193 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <MinimumVisualStudioVersion>10.0</MinimumVisualStudioVersion>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{238B510E-25EE-4F9D-80CE-BE9987EE8AD1}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Comparers</RootNamespace>
+    <AssemblyName>Comparers</AssemblyName>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkProfile>Profile1</TargetFrameworkProfile>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <CodeContractsAssemblyMode>1</CodeContractsAssemblyMode>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>TRACE;DEBUG;NO_GENERIC_VARIANCE NO_SERIALIZATION</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE;NO_GENERIC_VARIANCE NO_SERIALIZATION</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <DocumentationFile>bin\Release\Comparers.xml</DocumentationFile>
+    <CodeContractsEnableRuntimeChecking>False</CodeContractsEnableRuntimeChecking>
+    <CodeContractsRuntimeOnlyPublicSurface>True</CodeContractsRuntimeOnlyPublicSurface>
+    <CodeContractsRuntimeThrowOnFailure>True</CodeContractsRuntimeThrowOnFailure>
+    <CodeContractsRuntimeCallSiteRequires>False</CodeContractsRuntimeCallSiteRequires>
+    <CodeContractsRuntimeSkipQuantifiers>False</CodeContractsRuntimeSkipQuantifiers>
+    <CodeContractsRunCodeAnalysis>False</CodeContractsRunCodeAnalysis>
+    <CodeContractsNonNullObligations>False</CodeContractsNonNullObligations>
+    <CodeContractsBoundsObligations>False</CodeContractsBoundsObligations>
+    <CodeContractsArithmeticObligations>False</CodeContractsArithmeticObligations>
+    <CodeContractsEnumObligations>False</CodeContractsEnumObligations>
+    <CodeContractsRedundantAssumptions>False</CodeContractsRedundantAssumptions>
+    <CodeContractsInferRequires>False</CodeContractsInferRequires>
+    <CodeContractsInferEnsures>False</CodeContractsInferEnsures>
+    <CodeContractsInferObjectInvariants>False</CodeContractsInferObjectInvariants>
+    <CodeContractsSuggestAssumptions>False</CodeContractsSuggestAssumptions>
+    <CodeContractsSuggestRequires>True</CodeContractsSuggestRequires>
+    <CodeContractsSuggestEnsures>False</CodeContractsSuggestEnsures>
+    <CodeContractsSuggestObjectInvariants>False</CodeContractsSuggestObjectInvariants>
+    <CodeContractsDisjunctiveRequires>False</CodeContractsDisjunctiveRequires>
+    <CodeContractsRunInBackground>True</CodeContractsRunInBackground>
+    <CodeContractsShowSquigglies>False</CodeContractsShowSquigglies>
+    <CodeContractsUseBaseLine>False</CodeContractsUseBaseLine>
+    <CodeContractsEmitXMLDocs>False</CodeContractsEmitXMLDocs>
+    <CodeContractsCustomRewriterAssembly />
+    <CodeContractsCustomRewriterClass />
+    <CodeContractsLibPaths />
+    <CodeContractsExtraRewriteOptions />
+    <CodeContractsExtraAnalysisOptions />
+    <CodeContractsBaseLineFile />
+    <CodeContractsCacheAnalysisResults>False</CodeContractsCacheAnalysisResults>
+    <CodeContractsRuntimeCheckingLevel>Preconditions</CodeContractsRuntimeCheckingLevel>
+    <CodeContractsReferenceAssembly>%28none%29</CodeContractsReferenceAssembly>
+    <CodeContractsAnalysisWarningLevel>0</CodeContractsAnalysisWarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="..\Comparers\Comparers\AnonymousComparer.cs">
+      <Link>Comparers\AnonymousComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\ComparableBase.cs">
+      <Link>Comparers\ComparableBase.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\ComparableBaseWithOperators.cs">
+      <Link>Comparers\ComparableBaseWithOperators.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Compare %28of T%29.cs">
+      <Link>Comparers\Compare %28of T%29.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\ComparerExtensions.cs">
+      <Link>Comparers\ComparerExtensions.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\CompareSource.cs">
+      <Link>Comparers\CompareSource.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\IFullComparer.cs">
+      <Link>Comparers\IFullComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Linq\EnumerableExtensions.cs">
+      <Link>Comparers\Linq\EnumerableExtensions.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\ComparableImplementations.cs">
+      <Link>Comparers\Util\ComparableImplementations.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\ComparerBase.cs">
+      <Link>Comparers\Util\ComparerBase.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\ComparerHelpers.cs">
+      <Link>Comparers\Util\ComparerHelpers.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\CompoundComparer.cs">
+      <Link>Comparers\Util\CompoundComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\DefaultComparer.cs">
+      <Link>Comparers\Util\DefaultComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\NullComparer.cs">
+      <Link>Comparers\Util\NullComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\ReverseComparer.cs">
+      <Link>Comparers\Util\ReverseComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\SelectComparer.cs">
+      <Link>Comparers\Util\SelectComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\SequenceComparer.cs">
+      <Link>Comparers\Util\SequenceComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\SourceComparerBase.cs">
+      <Link>Comparers\Util\SourceComparerBase.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Comparers\Util\UtilityComparerExtensions.cs">
+      <Link>Comparers\Util\UtilityComparerExtensions.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\ContractExtensions.cs">
+      <Link>ContractExtensions.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\AnonymousEqualityComparer.cs">
+      <Link>EqualityComparers\AnonymousEqualityComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\EqualityCompare %28of T%29.cs">
+      <Link>EqualityComparers\EqualityCompare %28of T%29.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\EqualityComparerExtensions.cs">
+      <Link>EqualityComparers\EqualityComparerExtensions.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\EqualityCompareSource.cs">
+      <Link>EqualityComparers\EqualityCompareSource.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\EquatableBase.cs">
+      <Link>EqualityComparers\EquatableBase.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\EquatableBaseWithOperators.cs">
+      <Link>EqualityComparers\EquatableBaseWithOperators.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\CompoundEqualityComparer.cs">
+      <Link>EqualityComparers\Util\CompoundEqualityComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\EqualityComparerBase.cs">
+      <Link>EqualityComparers\Util\EqualityComparerBase.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\EqualityComparerHelpers.cs">
+      <Link>EqualityComparers\Util\EqualityComparerHelpers.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\ReferenceEqualityComparer.cs">
+      <Link>EqualityComparers\Util\ReferenceEqualityComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\SelectEqualityComparer.cs">
+      <Link>EqualityComparers\Util\SelectEqualityComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\SequenceEqualityComparer.cs">
+      <Link>EqualityComparers\Util\SequenceEqualityComparer.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\SourceEqualityComparerBase.cs">
+      <Link>EqualityComparers\Util\SourceEqualityComparerBase.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\EqualityComparers\Util\UtilityEqualityComparerExtensions.cs">
+      <Link>EqualityComparers\Util\UtilityEqualityComparerExtensions.cs</Link>
+    </Compile>
+    <Compile Include="..\Comparers\Properties\SharedAssemblyInfo.cs">
+      <Link>Properties\SharedAssemblyInfo.cs</Link>
+    </Compile>
+    <Compile Include="Contracts.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+  </ItemGroup>
+  <ItemGroup />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.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>

Source/Comparers (NET4, Win8, SL4, WP7, XBox)/Contracts.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace System.Diagnostics.Contracts
+{
+    internal static class Contract
+    {
+        public static T Result<T>() { return default(T); }
+
+        [Conditional("never")]
+        public static void Ensures(bool condition) { }
+
+        [Conditional("never")]
+        public static void Requires(bool condition) { }
+
+        [Conditional("never")]
+        public static void Assume(bool condition) { }
+
+        [Conditional("never")]
+        public static void Assert(bool condition) { }
+
+        [Conditional("never")]
+        public static void Invariant(bool condition) { }
+    }
+
+    internal sealed class ContractInvariantMethodAttribute : Attribute
+    {
+    }
+}

Source/Comparers (NET4, Win8, SL4, WP7, XBox)/Properties/AssemblyInfo.cs

@@ -0,0 +1,3 @@
+using System.Reflection;
+
+[assembly: AssemblyTitle("Comparers Library for .NET 4.0, Windows 8, Silverlight 4, Windows Phone Silverlight 7, and XBox")]