using System.Data.OleDb; // Instantiate and configure the connection string builder OleDbConnectionStringBuilder connectionStringBuilder = new OleDbConnectionStringBuilder(); connectionStringBuilder.DataSource = @"C:\Data\MyDatabase.accdb"; connectionStringBuilder.Provider = "Microsoft.ACE.OLEDB.12.0"; // Use the connection string builder to create an OleDbConnection object OleDbConnection connection = new OleDbConnection(connectionStringBuilder.ConnectionString);In this example, the connectionStringBuilder object is used to build a connection string for an Access database located at `C:\Data\MyDatabase.accdb`, using the Microsoft ACE OLEDB provider. Overall, the OleDbConnectionStringBuilder class is a useful tool for creating and managing connection strings for OLE DB data sources in C#. It is part of the System.Data.OleDb package library.