I have just found a great add-in for blogging my codes preserving the styles exactly the same as that I see in VS 2008. I am surely going to use it in future posts.
Follow the steps here - http://blogs.microsoft.co.il/blogs/bursteg/archive/2007/11/21/copy-source-as-html-copysourceashtml-for-visual-studio-2008-rtm.aspx