arrays - How Can I read From Line number() to line Starts with in C# -

let's have text file this

<pre>----------------      hpa     m      c  ---------------------  1004.0     28   13.6  1000.0     62   16.2   998.0     79   17.2   992.0    131   18.0 <pre>---------------- sometext here   1000.0     10   10.6  1000.0     10   11.2   900.0     10   12.2   900.0    100   13.0 <aaa>---------------- 

how can create array in c# reads text file line number 5 (1004.0) before line starts string <pre>-

i used string[] lines = system.io.file.readalllines(filepath); make each line in array problem want numbers of first section in array in order separate them later 3 arrays (hpa, m, c) .

here's possible solution. it's way more complicated should be, should give idea of possible mechanisms further refine data.

        string[] lines = system.io.file.readalllines("test.txt");         list<double> results = new list<double>();         foreach (var line in lines.skip(4))         {             if (line.startswith("<pre>"))                 break;             regex numberreg = new regex(@"\d+(\.\d){0,1}");  //will find number ending in ".x" - it's primitive, , won't work 0.01, no such data showed in example             var result = numberreg.matches(line).cast<match>().firstordefault();  //use first number each line. use cast<match>().skip(1).firstordefault second, , on...             if (result != null)                 results.add(convert.todouble(result.value, system.globalization.cultureinfo.invariantculture));  //note use of invariantculture, otherwise may need worry , or . in numbers         }