Determine if DB connection is successful or not

Here is code. How/where do I determine if "connection" to database was successful?
string connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;"
        + "Data Source=" + txtDatabaseName.Text + ";"
        + "Persist Security Info=False;"
        + "Mode=Share Deny None;";
IDbConnection dbConnection = new System.Data.OleDb.OleDbConnection(connectionString);
IDbCommand dbCommand = new System.Data.OleDb.OleDbCommand();
dbCommand.Connection = dbConnection;
IDbDataAdapter dataAdapter = new System.Data.OleDb.OleDbDataAdapter();
DataSet dsOldDB = new DataSet();
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