public IEnumerable<string> CoveredDllPaths(string testDllPath)
{
if(coveredProjectGuids == null)
{
initializeDllPaths();
}
string testDllGuid = dllPaths.Where(dll => dll.Value == testDllPath).First().Key;
IEnumerable<string> coveredGuids = coveredProjectGuids[testDllGuid];
return dllPaths.Where(dll => coveredGuids.Contains(dll.Key)).Select(dll => dll.Value);
}