title: Visual Studio 2010 always thinks project is out of date, but nothing has changed
body: <p>I have a very similar problem as described <a href="https://stackoverflow.com/questions/2640339/vs2010-always-relinks-the-project">here</a>.</p>
  
  <p>I also upgraded a mixed solution of C++/CLI and C# projects from Visual&nbsp;Studio&nbsp;2008 to Visual&nbsp;Studio&nbsp;2010. And now in Visual&nbsp;Studio&nbsp;2010 one C++/CLI project always runs out of date.</p>
  
  <p>Even if it has been compiled and linked just before and <kbd>F5</kbd> is hit, the messagebox "The project is out of date. Would you like to build it?" appears. This is very annoying because the DLL file is very low-tiered and forces almost all projects of the solution to rebuild.</p>
  
  <p>My pdb settings are set to the default value (<a href="https://stackoverflow.com/questions/2640339/vs2010-always-relinks-the-project">suggested solution of this problem</a>).</p>
  
  <p>Is it possible the get the reason why Visual&nbsp;Studio&nbsp;2010 forces a rebuild or thinks a project is up to date?</p>
  
  <p>Any other ideas why Visual&nbsp;Studio&nbsp;2010 behaves like that?</p>