My way of dealing with TFS Binaries folder... Simply call the following MSBuild task anywhere you want it to be executed :) <DisplayBinariesFolder RootFolder="C:\a\bin"/>

gistfile1.xml

<UsingTask TaskName="DisplayBinariesFolder" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll">
    <ParameterGroup>
      <RootFolder ParameterType="System.String" Required="true"/>
    </ParameterGroup>
    <Task>
      <Reference Include="System.Core"/>
      <Using Namespace="System"/>
      <Using Namespace="System.IO"/>
      <Using Namespace="Microsoft.Build.Framework"/>
      <Using Namespace="Microsoft.Build.Utilities"/>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
          try {
            string root = Path.GetFullPath(RootFolder);
            if (!Directory.Exists(root))
            {
                Log.LogMessage("Directory " + root + " does not exist!");
                return false;
            }
            
            Log.LogMessage("Scanning directory " + root);
            DirectoryInfo rootDirectory = new DirectoryInfo(root);
            foreach (FileInfo file in rootDirectory.GetFiles("*.*", SearchOption.AllDirectories))
            {
                Log.LogMessage(file.FullName);
            }
            return true;
          } 
          catch (Exception ex){
            Log.LogErrorFromException(ex);
            return false;
          }
        ]]>
      </Code>
    </Task>
  </UsingTask>