(use serverName\instanceName as Data Source to use an specifik SQLServer instance, only SQLServer2000)

(DBMSSOCN=TCP/IP instead of Named Pipes, at the end of the Data Source is the port to use (1433 is the default))

(use serverName\instanceName as Data Source to use an specifik SQLServer instance, only SQLServer2000)

(DBMSSOCN=TCP/IP instead of Named Pipes, at the end of the Data Source is the port to use (1433 is the default))

C#:
using System.Data.SqlClient;
SqlConnection oSQLConn = new SqlConnection();
oSQLConn.ConnectionString="my connectionstring";
oSQLConn.Open();

VB.NET:
Imports System.Data.SqlClient
Dim oSQLConn As SqlConnection = New SqlConnection()
oSQLConn.ConnectionString="my connectionstring"
oSQLConn.Open()

• Example:
  "Provider=sqloledb;Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=pubs;User ID=sa;Password=asdasd;"
  
  NameNetwork librarydbnmpntwWin32 Named PipesdbmssocnWin32 Winsock TCP/IPdbmsspxnWin32 SPX/IPXdbmsvinnWin32 Banyan VinesdbmsrpcnWin32 Multi-Protocol (Windows RPC)
  
  Important note!
  When connecting through the SQLOLEDB provider use the syntax Network Library=dbmssocn
  and when connecting through MSDASQL provider use the syntax Network=dbmssocn
  
  

• This table shows all connectionstring properties for the ADO.NET SqlConnection object. Most of the properties are also used in ADO. All properties and descriptions is from msdn.
  
  NameDefaultDescriptionApplication Name The name of the application, or '.Net SqlClient Data