Can not connect to local database with c# System.Data.SqlClient

I have some problems with connecting to my local DB using c# System.Data.SqlClient.

Information:

• DB parameters: Name:baza Host:localhost Instance:baza Port:3306 Schema:world
• My connection string: @"server=localhost\baza;password=pass;User Id=root;database=world;Persist Security Info=True"
• using: c#, System.Data.SqlClient, MySQL Workbench
• firewall off
• succesfull conection with JDBC, so server is working

JDBC parameters:

String url = "jdbc:mysql://localhost:3306/";
String driver = "com.mysql.jdbc.Driver";
String dbName = "world";
String username = "root";
String pass = "pass";

Problem:

• when I use conn.Open(); this happen => (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Tried:

• server=localhost then it gives => error: 40 - Could not open a connection to SQL Server
• many other stupid combinations like server=baza
• http://blogs.msdn.com/b/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx
• ASP.NET beginner question: How to get rid of this error?
• Connection to freesql.org server also failed

I have no idea what to do... Sth is probably with server name.

EDIT: code:

string connstr = @"Data Source=localhost\baza;password=qspass;User Id=root;"+
    "Initial Catalog=world;Persist Security Info=True";

Console.WriteLine(connstr);

SqlConnection conn = new SqlConnection(conbuild.ConnectionString);
conn.Open();

Console.WriteLine("YO!");
Some more code...

Never reached YO! :P