title: Opening projects and solutions in different versions of Visual Studio
body: <p>Why can't you open a project or solution that was developed using one version of visual studio in another version of visual studio? </p>
  
  <p>I understand that solutions contain projects and projects contain files e.g. aspx, vb etc.  I also understand that one version of visual studio could default to targeting one version of .NET and the another could target a different version of .NET.  Therefore I understand that it may be necessary to change code in the application if it now targets a different version of .NET as functions could be depreciated etc in a new version.</p>
  
  <p>I expected to find an answer to this online, but I have not.  For example, I have looked at the following question: <a href="https://stackoverflow.com/questions/5417592/difference-between-visual-studio-2008-and-visual-studio-2010">difference between visual studio 2008 and visual studio 2010</a>.</p>