Unable to process file

Question

Hi,
Is it too big to process file here,
https://1drv.ms/u/s!Ai8CrEskdewXvk21iZzHnqscSRwt?e=34UcMw

using codes below?

            using (StreamReader sr = new StreamReader(@"e:/inp2.txt", System.Text.Encoding.ASCII))
            {

                while ((line = sr.ReadLine()) != null)
                {
                    //if (line.Trim() == "")
                    //{

                    //}
                    //else
                    {
                        //str.Add(line.Trim().Substring(6));
                        str.Add(line);
                        //str.Add((line+"").Substring(5));
                    }
                }
            }

Answer 1

If the file is large, you cannot load it to memory, but often you can process it line-by-line.

For example, the next code counts the number of lines:

long count = 0;

foreach( string line in File.ReadLines( @"...path...", Encoding.ASCII ) )
{
   // TODO: process 'line' variable
   // . . .
   ++count;
}

Console.WriteLine( "Total lines: {0:#,##0}", count );

It only keeps the last line. Depending on your problem, you can also load and process a series of lines.