String strCmd = @"INSERT INTO someTable(someField) VALUES (@someValue)";

 System.Data.Odbc.OdbcCommand dbCmd = new System.Data.Odbc.OdbcCommand();
 dbCmd.CommandText = strCmd;
 dbCmd.CommandType = CommandType.Text;
 dbCmd.Connection = odbcCon;
              
 dbCmd.Parameters.Add("@someValue", System.Data.Odbc.OdbcType.Char, 25);
 dbCmd.Parameters["@someValue"].Direction = ParameterDirection.Input;
 dbCmd.Parameters["@someValue"].Value = "2";

 dbCmd.ExecuteNonQuery();