diff --git a/audit/audit.csproj b/audit/audit.csproj
new file mode 100644
index 000000000..5eecec0d7
--- /dev/null
+++ b/audit/audit.csproj
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="3.5" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
+    <ProductVersion>9.0.21022</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{D8A1AAF8-EA10-4D1D-8A8A-D38C56C0A753}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>audit</RootNamespace>
+    <AssemblyName>audit</AssemblyName>
+    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <PlatformTarget>x86</PlatformTarget>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <PlatformTarget>x86</PlatformTarget>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <ItemGroup>
+    <Compile Include="extract-missing.cs" />
+    <Compile Include="mono-api-diff.cs" />
+    <Compile Include="mono-api-info.cs" />
+    <Compile Include="AssemblyResolver.cs" />
+    <Compile Include="Util.cs" />
+    <Compile Include="WellFormedXmlWriter.cs" />
+    <Compile Include="gen-apidiff-html.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="Mono.Cecil, Version=0.9.4.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756">
+      <Private>False</Private>
+    </Reference>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/gtk-sharp.sln b/gtk-sharp.sln
index 8e2c23f6b..ef9c2ffbf 100644
--- a/gtk-sharp.sln
+++ b/gtk-sharp.sln
@@ -21,6 +21,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "gtk", "gtk\gtk.csproj", "{9
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "pango", "pango\pango.csproj", "{FF422D8C-562F-4EA6-8590-9D1A5CD40AD4}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "audit", "audit\audit.csproj", "{D8A1AAF8-EA10-4D1D-8A8A-D38C56C0A753}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x86 = Debug|x86
@@ -59,6 +61,10 @@ Global
 		{94045F11-4266-40B4-910F-298985AF69D5}.Debug|x86.Build.0 = Debug|x86
 		{94045F11-4266-40B4-910F-298985AF69D5}.Release|x86.ActiveCfg = Release|x86
 		{94045F11-4266-40B4-910F-298985AF69D5}.Release|x86.Build.0 = Release|x86
+		{D8A1AAF8-EA10-4D1D-8A8A-D38C56C0A753}.Debug|x86.ActiveCfg = Debug|x86
+		{D8A1AAF8-EA10-4D1D-8A8A-D38C56C0A753}.Debug|x86.Build.0 = Debug|x86
+		{D8A1AAF8-EA10-4D1D-8A8A-D38C56C0A753}.Release|x86.ActiveCfg = Release|x86
+		{D8A1AAF8-EA10-4D1D-8A8A-D38C56C0A753}.Release|x86.Build.0 = Release|x86
 		{FF422D8C-562F-4EA6-8590-9D1A5CD40AD4}.Debug|x86.ActiveCfg = Debug|x86
 		{FF422D8C-562F-4EA6-8590-9D1A5CD40AD4}.Debug|x86.Build.0 = Debug|x86
 		{FF422D8C-562F-4EA6-8590-9D1A5CD40AD4}.Release|x86.ActiveCfg = Release|x86