while (true)
        {
            //read in the file
            StreamReader convert = new StreamReader("../../convert.txt");

            //define variables
            string line = convert.ReadLine();
            double conversion;
            int numberIn;
            double conversionFactor;

            //ask for the conversion information
            Console.WriteLine("Enter the conversion in the form (Amount, Convert from, Convert to)");
            String inputMeasurement = Console.ReadLine();
            string[] inputMeasurementArray = inputMeasurement.Split(',');


            //loop through the lines looking for a match
            while (line != null)
            {
                string[] fileMeasurementArray = line.Split(',');
                if (fileMeasurementArray[0] == inputMeasurementArray[1])
                {
                    if (fileMeasurementArray[1] == inputMeasurementArray[2])
                    {
                        Console.WriteLine("The conversion factor for {0} to {1} is {2}", inputMeasurementArray[1], inputMeasurementArray[2], fileMeasurementArray[2]);

                        //convert to int
                        numberIn = Convert.ToInt32(inputMeasurementArray[0]);
                        conversionFactor = Convert.ToDouble(fileMeasurementArray[2]);

                        conversion = (numberIn * conversionFactor);
                        Console.WriteLine("{0} {1} is {2} {3} \n", inputMeasurementArray[0], inputMeasurementArray[1], conversion, inputMeasurementArray[2]);
                        break;
                    }
                }
                else
                {
                    Console.WriteLine("Please enter two valid conversion types \n");
                    break;
                }
                line = convert.ReadLine();


            }




        }

The file consists of the following:

ounce,gram,28.0
pound,ounce,16.0
pound,kilogram,0.454
pint,litre,0.568
inch,centimetre,2.5
mile,inch,63360.0

The user will input something like 6,ounce,gram

The idea is that it finds the correct line by checking if the first and second words in the file are the same as the second and third the user enters.

The problem is that if it checks the first line and it fails the if statement, if goes through to the else statement and stops. I am trying to find a way where it will stop after the it finds the correct line but not until. If someone types in a value that isn't in the file, then it should show an error.