R language has been extensively used for big data projects -- from XBox to cloud computing apps. If you are a C# developer and care about big data, R is a key supplementary language to your .NET languages. In this session, I will begin with comparing R and C#, and tell you what are the same, similar, different, and new to a .NET developer. Then we are going to walk through an example to show you how to explore data and answer questions using data and visualization. If you can bring a laptop, I suggest you install R, http://cran.r-project.org/; and RStudio, http://www.rstudio.com/products/rstudio/.