OleDbConnection

string connectString;
// ...
// ...
using (OleDbConnection connection = new OleDbConnection(connectString))
{
    connection.Open();

    // Start a local transaction.
    OleDbTransaction sqlTran = connection.BeginTransaction();

    // Enlist the command in the current transaction.
    OleDbCommand command = connection.CreateCommand();
    command.Transaction = sqlTran;

    try
    {
        command.CommandText =
          "INSERT INTO Table1(Name) VALUES('Wrong size')";
        command.ExecuteNonQuery();

        command.CommandText =
          "INSERT INTO Table2(Name) VALUES('Wrong color')";
        command.ExecuteNonQuery();

        sqlTran.Commit();
        Console.WriteLine("Both records were written to database.");
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
        Console.WriteLine("Neither record was written to database.");
        try{sqlTran.Rollback();}catch{}
    }
}