Solutions

The following sections describe solutions to the preceding problems. You can download the example solutions to see additional details and to experiment with the programs at https://github.com/PacktPublishing/Improving-your-C-Sharp-Skills/tree/master/Chapter17.

29. Removing blank lines

The following RemoveBlankLines method removes the blank lines from a file:

// Remove the empty lines from the indicated file.
private void RemoveBlankLines(string filename, out int numBlankLines,
    out int numNonBlankLines)
{
    // Read the file.
    string[] lines = File.ReadAllLines(filename);
    int totalLines = lines.Length;

    // Remove blank lines.
    List<string> nonblankLines = new List<string>();
    foreach (string line in lines)
        if (line.Trim().Length > 0)
            nonblankLines.Add(line);

    // Write the processed file.
    numNonBlankLines = nonblankLines.Count;
    numBlankLines = totalLines - numNonBlankLines;
    File.WriteAllLines(filename, nonblankLines...