is there in c# a similar to AWK in shell

Well, that code is (more or less) the LINQ equivalent of the 'traditional' code I posted earlier except that it will work if the search word is contained in not just one but multiple lines and prints out the whole text of the matched line and not just its line number.

The File.ReadLines() method reads the lines of the file one by one, without storing them all in memory at the same time, which is important if you have 50,000 lines to read.

For each line, an anonymous 'tuple' is then created consisting of the text of the line and the line number (starting from 1).

These tuples are then filtered so that only those whose 'text' property includes the search word are returned.

The foreach statement then iterates through the filtered tuples and prints to the console the line number and the text of the matched line.

So it sounds like that's what you want.

thanks for help.. im moving on.
i need to search in text file for a string, if its there get whole line where its located.. 
i found below example but could not understand it, ideas?

foreach (var match in File.ReadLines(@"c:\LogFile.txt")                           .Select((text, index) => new { text, lineNumber = index+ 1 })                           .Where(x => x.text.Contains("SEARCHWORD"))) {     Console.WriteLine("{0}: {1}", match.lineNumber, match.text); }

with awk, it will take $4 'QUAL', EQUIPM regardless how many spaces before but with line.Split, i need to be sure about every space

i used below but it needs many customization

You can use string.Split() to split the string on whitespace; you will get an array-element back for every space (so your index will not be 4); you can loop through the array and ignore empty array elements.