I have just started using C# and do not know much about it. I am using the 3d game engine called Unity and trying to write a c# script to access the MySQL database that I am
You will need to get the C# MySQL driver: http://dev.mysql.com/downloads/connector/net/
And then you will need to follow the MySQL manual for setting it up and using it. It's a standard ADO.NET driver, so you should be able to follow most any C# SQL tutorials out there for additional help.