c# saving textbox.text to txt file. txt file doesn't recognize end of line character

I have the following code:

void AppendText(string txt)
{
    txt = txt + "\r\n";
    Textbox1.AppendText(txt);
    Textbox1.Select(Textbox1.Text.Length,0);
}

//....

void someFunction()
{
    //...
    string log = @"C:\log.txt";
    using (FileStream fs = new FileStream(log, FileMode.Create))
    {
        开发者_如何学Cusing (StreamWriter sw = new StreamWriter(fs))
        {
            sw.Write(Textbox1.Text);
        }
    }
    //...
}  

The problem is in Textbox1.Text field in the form, "\r\n" works fine, but when I copy the Textbox1.Text to log.txt, the log.txt doesn't have new line where it's supposed to be. Instead there's a strange charater like this "[]" where "\r\n" is. I think problem lies in the sw.Write(tbox.text) right? But I don't know how to fix it. Could anyone give me a hand? Help is really appreciated. Thanks in advance.

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My guess would be that the Textbox creates unicode characters (two bytes per character). In what format are you reading the data? ASCII unicode UTF?

If I remember correctly /n/r is an old trick to write a newline character to the string but in what format and what does it mean? Environment.Newline is much better and would work on windows mobile/unix builds too.

I usually create a class level variable called br with environment.newline as its content, creates much shorter code.

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You should do like this.

string log = @"C:\log.txt";     
using (FileStream fs = new FileStream(log, FileMode.Create))     
{
     using (StreamWriter sw = new StreamWriter(fs))
     {
         foreach(string line in Textbox1.Lines)
             sw.Write(line+sw.NewLine);
     }
 } 

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Your code is correct. Just add sw.Close(); after sw.Write(Textbox1.Text);