>How can I store a DB connection string with my C# project? I have different string determined by where I'm working at, so I'd like make it work around that.

If it's a desktop app save in the app.config file, for a web app saving it in the web.config file. Something like:

Desktop:

<configuration>
  <appSettings>
   <add key="connection" value="connection string here"></add>
  <appSettings>
</configuration>

Read it with:

   using System.Configuration;
   //
   string connString = ConfigurationSettings.AppSettings("connection");

Web:

<connectionStrings>
  <add name="connection" connectionString="conn string here"/>
</connectionStrings>

Read it with:

System.Configuration.ConnectionStringSettings connSetting = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["connection"];
string connString = connSetting.ConnectionString;