读取文件中的特定行/整数并转换为其他C＃

Question

I want to read a file, at a specific location/line (which will always remain the same) and convert it to a string. For ex: read line 3 (which will contain numbers -3,-2, 2, 4, 7, 10 OR 12 ) and convert it to F,D,C,B,B-,A, OR A+ . Probably I will use an if statement to tell the app which number should convert to which letter, so you can skip this part. To specify, I know how to read a file, but I need to know how to read at that specific location and convert it right away and print it.

Answer 1

For reading the file at specific position look at here .

For converting to string you can do this:

Dictionary<string, string> matches = new Dictionary<string, string>()
{
   {"-3", "F"}, {"-2", "D"}, {"2", "C"}, {"4", "B"}, ...
};

now conversion would be like:

 string result = "notfound";
 result = matches.TryGetValue(valueYouHaveRead, out result);