I have install visual studio 2013 for Nopcommerce 3.30 after that i want to open nopcommerce 2.65 project in visual studio 2010 it's telling me "The Project type is not supported by this installtaion" .
Please help me.
You can open VS 2013 and then open your 2.65 version. If you want to open it with 2010 you should first to open 2.65 project with notepad ++ and to see a first few rows. It looks like you have opened your 2.65 version with VS 2013, it converted it and added some records into the project file. Try to change a version of VS, to save and open it again with VS 2010.