Security of SQL Server

Question

Hi all, I need your help. How to do the below by code in C#: - How to know if exists a SQL Server. - if exists, how to know if exists an especific Data Base - How to create a Data Base by code. May be is hard to explain, but I just want a link or a document. If someboody has a link post it please. If somebody has a document, please send it to: [email protected] thank you in advance.