# What is F#? F# (pronounced F sharp) is a strongly typed, multi-paradigm programming language that encompasses functional, imperative, and object-oriented programming techniques. F# is most often used as a cross-platform CLI language, but can also be used to generate JavaScript and GPU code. > [wikipedia.org/wiki/F Sharp (programming language)](https://en.wikipedia.org/wiki/F_Sharp_%28programming_language%29) %%LOGO%% # How to use this image ## Start your application inside this image The most straightforward way to use this image is to use it both as the build and runtime environment. In your `Dockerfile`, you can write something similar to the following: ```dockerfile FROM %%IMAGE%% COPY . /app RUN xbuild /app/myproject.sln ``` This will copy your application source code into the image and use `xbuild` to build it.