title: Downloaded MVC application is not loaded in Visual Studio 2010
body: <p>I am newbie in .NET Development.
  I just downloaded a built application and using the following products:</p>
  
  <p>MVC 4 framework 
  Visual Studio 2010 Ultimate
  Windows 7 Ultimate 64 bit</p>
  
  <p>But when I try to run .sln(solution file) file I get the following error:</p>
  
  <p>C:\Users...\Desktop\contosouniversity\contosouniversity\contosouniversity.csproj : error : The project file 'C:\Users...\Desktop\contosouniversity\contosouniversity\contosouniversity.csproj' cannot be opened.</p>
  
  <p>The project type is not supported by this installation.</p>
  
  <p>I am using MVC4 framework for loading this project, Visual studio 2010 MVC4 framework seems to be working with lower versions i guess(i.e. MVC3) , if i am doing wrong, please let me know.</p>
  
  <p>Is it necessary to download MVC3 as well?</p>