title: Why does Visual Studio prevent me from seeing the .csproj file, and is there a way to force it open?
body: <p>When I sought the hardcoded origin of the port number my Web API uses, I found it in the project's *.csproj file. Yet when I 2-click it from the Find Results window in Visual Studio, it won't open and I'm rather brusquely informed, "<em>The document 'Bla*.csproj' is already open as a project or a solution and cannot be opened in an editor at this time.</em>"</p>
  
  <p>To look at it, I have to open it with Notepad++, which shows me what I want:</p>
  
  <pre><code>&lt;WebProjectProperties&gt;
    &lt;UseIIS&gt;True&lt;/UseIIS&gt;
    &lt;AutoAssignPort&gt;True&lt;/AutoAssignPort&gt;
    &lt;DevelopmentServerPort&gt;28642&lt;/DevelopmentServerPort&gt;
    &lt;DevelopmentServerVPath&gt;/&lt;/DevelopmentServerVPath&gt;
    &lt;IISUrl&gt;http://localhost:28642/&lt;/IISUrl&gt;
    &lt;NTLMAuthentication&gt;False&lt;/NTLMAuthentication&gt;
    &lt;UseCustomServer&gt;False&lt;/UseCustomServer&gt;
    &lt;CustomServerUrl&gt;
    &lt;/CustomServerUrl&gt;
    &lt;SaveServerSettingsInUserFile&gt;False&lt;/SaveServerSettingsInUserFile&gt;
  &lt;/WebProjectProperties&gt;
  </code></pre>
  
  <p>...but this is kind of painful. Is there a quicker way to open a .csproj file from within the project/Visual Studio (2013)?</p>