No, the while loop is an essential part to make you possible to read all the lines of the text files using StreamReader.ReadLine().

Before I continue, can you explain first, what should method...

Yes, I agree with iamthwee and tgreer. That's why I'm asking you whether you already know how to read the pdf file or not. Since it's a big obstacle to solve first, before goes into your main...

Do you already know how to read a pdf file? how the format, and so on?

regards,
Lok

Hi, your problem is not related to the text file that you want to read. The real problem is because you create a method that has a return value of type string, but inside the method's logic, there's...

Easy then, no need to use any hashtable, just use array of boolean.

private bool[] flag = new bool[10];

each time you iterate the integer array, check against the flag array using the current...

Sorry, forgot to asking.. is all the integers are 1-digit (0 to 9)?

regards,

Lok

Actually I'm not sure with kind of coding that you do (maybe a code snippet will help), but from what I'm understanding from reading your post, that you try to invoke GUI-related function from...

Before that, please confirm. What is the input parameter of the function? is it an array of integers? or a string?
since you mention that the function must return the same array (no allocation),...