title: Updating GAC dlls
body: <p>I got a DLL registered in the GAC which has a bug in it (v4.2.0).</p>
  
  <p>I've therefore fixed that bug, updated the file version only (v4.2.1) (keeping the assembly version, v4.2.0) and built a new MSI package.</p>
  
  <p>The problem is that the DLL is not installed in the GAC. I verified this by right-clicking on the DLL in <code>C:\Windows\Microsoft.NET\assembly\GAC_MSIL\MyDLL\v4.0_4.2.0.0__2269313d92725976</code> and checked the file version, which is still <code>v4.2.0</code> There are also no other folders created under <code>C:\Windows\Microsoft.NET\assembly\GAC_MSIL\MyDLL</code>.</p>
  
  <p><strong>But!</strong> If I uninstall the first version and then install the new DLL it get's installed OK in the GAC.</p>
  
  <p>Am I approaching this the wrong way? Our applications are set to use specific versions, so just creating assembly version v4.3.0 and install it in the GAC wont work.</p>
  
  <p><strong>Update</strong> </p>
  
  <p>I've found the article about publisher policies ( <a href="http://support.microsoft.com/kb/891030" rel="noreferrer">http://support.microsoft.com/kb/891030</a>) and are attempting that instead. I've generated the policy assembly. But Visual Studio crashes when I try to add it to the setup project  =( </p>
  
  <p>I've also tried to add it as a content file to the primary project (and then add content files to GAC). But then it complains on the assembly not being signed.</p>
  
  <p>So I'm still stuck.</p>