How to open visual studio 2010 projects in visual studio 2008 (downgrade from VS 2010 to VS 2008)

1.Make back up of your .sln file
 
2.Open the .sln file corresponding to the Project to be converted with Notepad
 
Locate the following line: Microsoft Visual Studio Solution File, Format Version 11.00 Replace 11.00 with 10.00

3.Locate the following line: # Visual Studio 10

4.Replace 2010 with 2008

5.Save the File

6.Delete the .cache files existing in the following paths:
* obj/debug
* obj/release

7.Open the project with Visual Studio 2008

8.Build the project with Visual Studio 2008