Introduction Hello everyone. My name is Yusuke Matsushita. I am a 5th grader of Nada High School. My handle as a programmer is Kinokkory. Follow me on twitter @shiatsumat. I am interested in category theory and fond of Wikipedia. I belong to so many clubs I am busy. I have learned many programming languages and believe that C# is the best choice. I hope that you will like this language after this presentation.