C#, StreamWriternél, hogy lehet backspace-t csinálni?

Javítottam egy hibát

StreamReader log = new StreamReader(Application.StartupPath + @"\log.txt");

string logString = log.ReadToEnd();

log.Close();

char[] logChar = logString.ToCharArray();

int logLength = logString.Length;

int i=0;

do

{

if (logChar[i]=='<' && logChar[i+1]=='b' && logChar[i+2]=='s' && logChar[i+3]=='>')

{

logString = logString.Remove(i - 1, 5);

i = i - 5;

logChar = logString.ToCharArray();

}

i++;

logLength = logString.Length;

} while (i<logLength);

Console.WriteLine(logString);