C# - How to Stop StreamWriter Writing Blank Line at the End of a File?

Question

I have searched numerous web pages but I can't seem to find anywhere which shows how to stop a blank line appearing at the end of a file when using StreamWriter.

The code I've written below is the only way I can get this to work for me.. and although this works perfectly fine for the utility I am creating, I would like to know if there is a better/more efficient way to do this?

        int count = 0;
        int lineCount = newFile.Count;

        using (System.IO.StreamWriter extract = new System.IO.StreamWriter(outputFile, true))
        {
            foreach (var line in newFile)
            {
                count++;

                if (count != lineCount)
                {
                    extract.Write(line + Environment.NewLine);
                }
                else
                {
                    extract.Write(line);
                }
            }
        }

Any thoughts people?

Answer 1

Since you are accessing the Count property, it means that your newFile source implements the IList interface. This means that you can access it by its index.

Use for loop instead of foreach :

for (int i = 0; i < newFile.Count - 1; i++)
{
    extract.WriteLine(newFile[i]);
}
extract.Write(newFile[newFile.Count - 1]);

Answer 2

Check this...

var values = Enumerable.Range(1,10);

var output = string.Format(string.Join(",{0}", values), Environment.NewLine);

File.WriteAllText(path, output);