App.Config

<?xml version="1.0" encoding="utf-8" ?>
<configuration >
  <add key="Mode" value="NoMode"/>
</configuration>

App.Debug.config

<?xml version="1.0" encoding="utf-8" ?>
<!-- For more information on using transformations 
     see the web.config examples at http://go.microsoft.com/fwlink/?LinkId=214134. -->
<configuration  xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <add key="Mode" value="DebugMode" xdt:Transform="Replace"/>
</configuration>

App.Release.Config

<?xml version="1.0" encoding="utf-8" ?>
<!-- For more information on using transformations 
     see the web.config examples at http://go.microsoft.com/fwlink/?LinkId=214134. -->
<configuration  xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <add key="Mode" value="ReleaseMode" xdt:Transform="Replace"/>
</configuration>

MyProject.csproj

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <!--
    This section defines project-level properties.

    AssemblyName
      Name of the output assembly.
    Configuration
      Specifies a default value for debug.
    OutputType
      Must be "Library" for VSTO.
    Platform
      Specifies what CPU the output of this project can run on.
    NoStandardLibraries
      Set to "false" for VSTO.
    RootNamespace
      In C#, this specifies the namespace given to new files. In VB, all objects are
      wrapped in this namespace at runtime.
  -->
  <PropertyGroup>
    <ProjectTypeGuids>{BAA0C2D2-18E2-41B9-852F-F413020CAA33};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProjectGuid>{D7262356-D8EA-422D-889D-1F250D70EB26}</ProjectGuid>
    <OutputType>Library</OutputType>
    <NoStandardLibraries>false</NoStandardLibraries>
    <RootNamespace>Outlook_With_SlowCheetah</RootNamespace>
    <AssemblyName>Outlook_With_SlowCheetah</AssemblyName>
    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
    <DefineConstants>VSTO40</DefineConstants>
    <NuGetPackageImportStamp>
    </NuGetPackageImportStamp>
    <IsWebBootstrapper>False</IsWebBootstrapper>
    <BootstrapperEnabled>true</BootstrapperEnabled>
    <PublishUrl>publish\</PublishUrl>
    <InstallUrl />
    <TargetCulture>en</TargetCulture>
    <ApplicationVersion>1.0.0.13</ApplicationVersion>
    <AutoIncrementApplicationRevision>true</AutoIncrementApplicationRevision>
    <UpdateEnabled>true</UpdateEnabled>
    <UpdateInterval>7</UpdateInterval>
    <UpdateIntervalUnits>days</UpdateIntervalUnits>
    <ProductName>Outlook_With_SlowCheetah</ProductName>
    <PublisherName />
    <SupportUrl />
    <FriendlyName>Outlook_With_SlowCheetah</FriendlyName>
    <OfficeApplicationDescription />
    <LoadBehavior>3</LoadBehavior>
  </PropertyGroup>
  <ItemGroup>
    <BootstrapperPackage Include=".NETFramework,Version=v4.5.2">
      <Visible>False</Visible>
      <ProductName>Microsoft .NET Framework 4.5.2 %28x86 and x64%29</ProductName>
      <Install>true</Install>
    </BootstrapperPackage>
    <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1">
      <Visible>False</Visible>
      <ProductName>.NET Framework 3.5 SP1</ProductName>
      <Install>false</Install>
    </BootstrapperPackage>
    <BootstrapperPackage Include="Microsoft.VSTORuntime.4.0">
      <Visible>False</Visible>
      <ProductName>Microsoft Visual Studio 2010 Tools for Office Runtime %28x86 and x64%29</ProductName>
      <Install>true</Install>
    </BootstrapperPackage>
    <BootstrapperPackage Include="Microsoft.Windows.Installer.4.5">
      <Visible>False</Visible>
      <ProductName>Windows Installer 4.5</ProductName>
      <Install>true</Install>
    </BootstrapperPackage>
  </ItemGroup>
  <PropertyGroup>
    <!--
      OfficeApplication
        Add-in host application
    -->
    <OfficeApplication>Outlook</OfficeApplication>
  </PropertyGroup>
  <!--
    This section defines properties that are set when the "Debug" configuration is selected.

    DebugSymbols
      If "true", create symbols (.pdb). If "false", do not create symbols.
    DefineConstants
      Constants defined for the preprocessor.
    EnableUnmanagedDebugging
      If "true", starting the debugger will attach both managed and unmanaged debuggers.
    Optimize
      If "true", optimize the build output. If "false", do not optimize.
    OutputPath
      Output path of project relative to the project file.
    WarningLevel
      Warning level for the compiler.
  -->
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug\</OutputPath>
    <EnableUnmanagedDebugging>false</EnableUnmanagedDebugging>
    <DefineConstants>$(DefineConstants);DEBUG;TRACE</DefineConstants>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <!--
    This section defines properties that are set when the "Release" configuration is selected.

    DebugSymbols
      If "true", create symbols (.pdb). If "false", do not create symbols.
    DefineConstants
      Constants defined for the preprocessor.
    EnableUnmanagedDebugging
      If "true", starting the debugger will attach both managed and unmanaged debuggers.
    Optimize
      If "true", optimize the build output. If "false", do not optimize.
    OutputPath
      Output path of project relative to the project file.
    WarningLevel
      Warning level for the compiler.
  -->
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\Release\</OutputPath>
    <EnableUnmanagedDebugging>false</EnableUnmanagedDebugging>
    <DefineConstants>$(DefineConstants);TRACE</DefineConstants>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <!--
    This section specifies references for the project.
  -->
  <ItemGroup>
    <Reference Include="Accessibility" />
    <Reference Include="System" />
    <Reference Include="System.Data" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.Windows.Forms" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Core" />
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="Microsoft.CSharp" />
  </ItemGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Office.Tools.v4.0.Framework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
    <Reference Include="Microsoft.VisualStudio.Tools.Applications.Runtime, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
    <Reference Include="Microsoft.Office.Tools, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
    <Reference Include="Microsoft.Office.Tools.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
    <Reference Include="Microsoft.Office.Tools.Outlook, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
  </ItemGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Office.Tools.Common.v4.0.Utilities, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <Private>True</Private>
    </Reference>
    <Reference Include="Microsoft.Office.Tools.Outlook.v4.0.Utilities, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <Private>True</Private>
    </Reference>
  </ItemGroup>
  <ItemGroup>
    <Reference Include="Office, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c">
      <Private>False</Private>
      <EmbedInteropTypes>true</EmbedInteropTypes>
    </Reference>
    <Reference Include="Microsoft.Office.Interop.Outlook, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c">
      <Private>False</Private>
      <EmbedInteropTypes>true</EmbedInteropTypes>
    </Reference>
    <Reference Include="stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
      <Private>False</Private>
    </Reference>
  </ItemGroup>
  <!--
    This section defines the user source files that are part of the project.
     
    A "Compile" element specifies a source file to compile.
    An "EmbeddedResource" element specifies an .resx file for embedded resources.
    A "None" element specifies a file that is not to be passed to the compiler (for instance, 
    a text file or XML file).
    The "AppDesigner" element specifies the directory where the application properties files
    can be found.
  -->
  <ItemGroup>
    <Compile Include="Properties\AssemblyInfo.cs">
      <SubType>Code</SubType>
    </Compile>
    <EmbeddedResource Include="Properties\Resources.resx">
      <Generator>ResXFileCodeGenerator</Generator>
      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
      <SubType>Designer</SubType>
    </EmbeddedResource>
    <Compile Include="Properties\Resources.Designer.cs">
      <AutoGen>True</AutoGen>
      <DependentUpon>Resources.resx</DependentUpon>
    </Compile>
    <Content Include="App.config">
      <TransformOnBuild>true</TransformOnBuild>
    </Content>
    <Content Include="AppConfig\AppSettings.config">
      <TransformOnBuild>true</TransformOnBuild>
    </Content>
    <Content Include="AppConfig\AppSettings.Debug.config">
      <DependentUpon>AppConfig\AppSettings.config</DependentUpon>
      <IsTransformFile>True</IsTransformFile>
    </Content>
    <Content Include="AppConfig\AppSettings.Release.config">
      <DependentUpon>AppConfig\AppSettings.config</DependentUpon>
      <IsTransformFile>True</IsTransformFile>
    </Content>
    <None Include="App.Debug.config">
      <DependentUpon>App.config</DependentUpon>
      <IsTransformFile>True</IsTransformFile>
    </None>
    <None Include="App.Release.config">
      <DependentUpon>App.config</DependentUpon>
      <IsTransformFile>True</IsTransformFile>
    </None>
    <None Include="Outlook_With_SlowCheetah_TemporaryKey.pfx" />
    <None Include="packages.config" />
    <None Include="Properties\Settings.settings">
      <Generator>SettingsSingleFileGenerator</Generator>
      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
    </None>
    <Compile Include="Properties\Settings.Designer.cs">
      <AutoGen>True</AutoGen>
      <DependentUpon>Settings.settings</DependentUpon>
    </Compile>
    <Compile Include="ThisAddIn.cs">
      <SubType>Code</SubType>
    </Compile>
    <None Include="ThisAddIn.Designer.xml">
      <DependentUpon>ThisAddIn.cs</DependentUpon>
    </None>
    <Compile Include="ThisAddIn.Designer.cs">
      <DependentUpon>ThisAddIn.Designer.xml</DependentUpon>
    </Compile>
    <AppDesigner Include="Properties\" />
  </ItemGroup>
  <PropertyGroup>
    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
  </PropertyGroup>
  <PropertyGroup>
    <SignManifests>true</SignManifests>
  </PropertyGroup>
  <PropertyGroup>
    <ManifestKeyFile>Outlook_With_SlowCheetah_TemporaryKey.pfx</ManifestKeyFile>
  </PropertyGroup>
  <PropertyGroup>
    <ManifestCertificateThumbprint>B8AD13270921FCA636C798489704C384D092E20E</ManifestCertificateThumbprint>
  </PropertyGroup>
  <!-- Transform the app config per project configuration.-->
  <PropertyGroup>
    <!-- This ensures compatibility across multiple versions of Visual Studio when using a solution file.
         However, when using MSBuild directly you may need to override this property to 11.0 or 12.0 
         accordingly as part of the MSBuild script, ie /p:VisualStudioVersion=11.0;
         See http://blogs.msdn.com/b/webdev/archive/2012/08/22/visual-studio-project-compatability-and-visualstudioversion.aspx -->
    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
  </PropertyGroup>
  <!-- Include the build rules for a C# project. -->
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
  <Import Project="$(MSBuildExtensionsPath)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Web\Microsoft.Web.Publishing.targets" />
  <!-- Include additional build rules for an Office application add-in. -->
  <Import Project="$(VSToolsPath)\OfficeTools\Microsoft.VisualStudio.Tools.Office.targets" Condition="'$(VSToolsPath)' != ''" />
  <!-- This section defines VSTO properties that describe the host-changeable project properties. -->
  <ProjectExtensions>
    <VisualStudio>
      <FlavorProperties GUID="{BAA0C2D2-18E2-41B9-852F-F413020CAA33}">
        <ProjectProperties HostName="Outlook" HostPackage="{29A7B9D7-A7F1-4328-8EF0-6B2D1A56B2C1}" OfficeVersion="15.0" VstxVersion="4.0" ApplicationType="Outlook" Language="cs" TemplatesPath="" DebugInfoExeName="#Software\Microsoft\Office\16.0\Outlook\InstallRoot\Path#outlook.exe" AddItemTemplatesGuid="{A58A78EB-1C92-4DDD-80CF-E8BD872ABFC4}" />
        <Host Name="Outlook" GeneratedCodeNamespace="Outlook_With_SlowCheetah" PublishedHash="69C324AB27932AA2FBF2B7EA72250886FF164DE6" IconIndex="0">
          <HostItem Name="ThisAddIn" Code="ThisAddIn.cs" CanonicalName="AddIn" PublishedHash="667AE3DDA0B3AE69D4EAABE868BDC494F0536BA3" CanActivate="false" IconIndex="1" Blueprint="ThisAddIn.Designer.xml" GeneratedCode="ThisAddIn.Designer.cs" />
        </Host>
      </FlavorProperties>
    </VisualStudio>
  </ProjectExtensions>
  <Import Project="..\packages\SlowCheetah.2.5.48\build\SlowCheetah.targets" Condition="Exists('..\packages\SlowCheetah.2.5.48\build\SlowCheetah.targets')" />
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('..\packages\SlowCheetah.2.5.48\build\SlowCheetah.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\SlowCheetah.2.5.48\build\SlowCheetah.targets'))" />
  </Target>
  <Target Name="SetTransformAppConfigDestination" BeforeTargets="PrepareForBuild" Condition="exists('app.$(Configuration).config')">
    <PropertyGroup>
      <!-- Force build process to use the transformed configuration file from now on. -->
      <AppConfig>$(IntermediateOutputPath)$(TargetFileName).config</AppConfig>
    </PropertyGroup>
    <Message Text="AppConfig transformation destination: = $(AppConfig)" />
  </Target>
  <!-- Transform the app.config after the prepare for build completes. -->
  <Target Name="TransformAppConfig" AfterTargets="PrepareForBuild" Condition="exists('app.$(Configuration).config')">
    <!-- Generate transformed app config in the intermediate directory -->
    <TransformXml Source="app.config" Destination="$(AppConfig)" Transform="app.$(Configuration).config" />
  </Target>
</Project>