how to write to beginning of file with Stream Writer?

Question

I want to insert my string to the beginning of the file. But there is no function to append in beginning in stream writer. So how should I do that ?

My code is :

string path = Directory.GetCurrentDirectory() + "\\test.txt";
StreamReader sreader = new StreamReader(path);
string str = sreader.ReadToEnd();
sreader.Close();

StreamWriter swriter = new StreamWriter(path, false);

swriter.WriteLine("example text");
swriter.WriteLine(str);
swriter.Close();

But it doesn't seem optimized. So is there any other way ?

Answer 1

You are almost there:

        string path = Directory.GetCurrentDirectory() + "\\test.txt";
        string str;
        using (StreamReader sreader = new StreamReader(path)) {
            str = sreader.ReadToEnd();
        }

        File.Delete(path);

        using (StreamWriter swriter = new StreamWriter(path, false))
        {
            str = "example text" + Environment.NewLine + str;
            swriter.Write(str);
        }