proj.fsproj

<Project xmlns='http://schemas.microsoft.com/developer/msbuild/2003' ToolsVersion='4.0'>
  <PropertyGroup>
    <FSharpTargetsPath>$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\FSharp\Microsoft.FSharp.Targets</FSharpTargetsPath>
    <FSharpTargetsPath>$(MSBuildExtensionsPath32)\..\Microsoft SDKs\F#\3.0\Framework\v4.0\Microsoft.FSharp.Targets</FSharpTargetsPath>
  </PropertyGroup>
  <Import Project="$(FSharpTargetsPath)" Condition="Exists('$(FSharpTargetsPath)')" />
  <ItemGroup>
    <Reference Include='mscorlib' />
    <Reference Include='System' />
    <Reference Include='System.Core' />
    <Reference Include='FSharp.Core' />
    <Reference Include='System.Drawing' />
    <Reference Include='packages/OpenTK/lib/net20/OpenTK.dll' />
    <Compile Include="base.fs" />
    <Compile Include="opengl.fs" />
    <Compile Include="tree.fs" />
    <Compile Include="tower.fs" />
    <Compile Include="castle.fs" />
    <Compile Include="main.fs" />
  </ItemGroup>
</Project>