how to use same StreamReader for two methods

See more:

C#

C#4.0

Dears, i am using stream reader to read each line,but when i am reading in some cases i need to call another method and this method will read the next line to check its value,then first function will continue. it is working normally but in the second method i opening new stream reader (i am reading from same file) so how can i avoid to open new stream reader and use the opened one.and when i read the next line in second method then continue reading in first mehtod normally(it will read the next line and in this case it is the line that checked in second method).
thanks...

if (line.StartsWith(Utilities.SCRIPT_COMMAND_CMD, StringComparison.InvariantCultureIgnoreCase)) {
 command = GetCommand(line, Utilities.SCRIPT_COMMAND_CMD, clearScriptPath);
}



 private APDUCommand GetCommand(string scriptLine, string commandType, string clearScriptPath) {
            APDUCommand command = new APDUCommand() { CommandType = commandType };
            command.CommandBody = ReplaceByRegularExpression(scriptLine, commandType, string.Empty);
            string line;
            bool containsScriptLine = false;
            StreamReader reader = null;
            try {
                reader = new StreamReader(clearScriptPath);
                while ((line = reader.ReadLine()) != null) {
                    if (line.Contains(scriptLine) || containsScriptLine) {
                        if (containsScriptLine == true) {
                            if (line.StartsWith("(")) {
                                command.CommandBody += @"\";
                            }
                        }
                        containsScriptLine = true;
                    }
                }
            }
            finally {
                if (reader != null) {
                    reader.Close();
                }
            }
            return command;
        }