Append text to text file first line

Hello EE,

Im trying to add strings to a text file, but i want to add at the beginning of the file, not at the end. Right now, im doing this :

        If My.Computer.FileSystem.FileExists(mydocpath + "//text.txt") Then
            Using sw As StreamWriter = File.AppendText(mydocpath + "\text.txt")
                For Each kvp As KeyValuePair(Of Date, String) In MyItems
                    sw.WriteLine(kvp.Key + ";" + kvp.Value)
                Next
            End Using
        End If

but it adds at the end... what could I do ?
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PhilippeRenaudAsked:
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Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
You can't "append" at the top of a file. You have to copy the file with the changes. That is, write the new lines in reversed order, than append the old content.
If you doing that frequently (e.g. every second or so), and files can get large - don't. All tools to watch progress in log files are optimized to look at the tail, because that is orders of magnitude faster.

There are implementations of log files writing new content to the top, but they often cut off the file at a certain size or number of lines, and "rotate" content out of the file (dismissing or archiving it). This can be done efficiently.
käµfm³d 👽Commented:
So you want to "prepend" the data? If so, then you need to start a new file, add the text to be prepended, then add the text from the original file.
Rgonzo1971Commented:
HI,
pls try something like this
        If My.Computer.FileSystem.FileExists(mydocpath + "//text.txt") Then
             using (StreamReader sreader = new StreamReader(mydocpath + "//text.txt") ))
             {
                  str = sreader.ReadToEnd();
             }

        File.Delete(mydocpath + "//text.txt");

        using (StreamWriter swriter = new StreamWriter(mydocpath + "//text.txt", false))
        {
            For Each kvp As KeyValuePair(Of Date, String) In MyItems
                     swriter .WriteLine(kvp.Key + ";" + kvp.Value)
            Next
            swriter.Write(str);
        }
         End If

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Regards

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PhilippeRenaudAuthor Commented:
thanks
PhilippeRenaudAuthor Commented:
Hey Kaufmed, or anybody else.. a nice question for you here if you can help me.

http://www.experts-exchange.com/questions/28697160/Speed-up-my-loops.html

thanks
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