string ConnStr = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:abc.mdb;Jet OLEDB:Database Password=password";

OleDbConnection MyConn = new OleDbConnection(ConnStr);

MyConn.Open();

OleDbCommand Cmd =  new OleDbCommand(StrCmd, MyConn);;
OleDbDataReader ObjReader = Cmd.ExecuteReader();

if (ObjReader != null)
{

}

ObjReader.Close();
MyConn.Close();