How to customize bootstrap 3 sass with visual studio 2015

Hi 

Thanks for your response. None of your links answers my question. I have already set up the MVC 5 sass project and is working fine. All that I need is the best steps to doing sass customization. I don't want to customize the bootstrap-sass files directly. That is my question. How do I do the customization wthout customizing the bootstrap sass files directly. I know I can create a custom.sass file and import  stuff in there, but how? 

try these links:

 

https://code.visualstudio.com/docs/languages/css

https://www.codementor.io/trey/create-custom-bootstrap-build-with-scss-du107p62v

https://stackoverflow.com/questions/28541667/how-do-i-setup-bootstrap-sass-scss-with-visual-studio-2013