reemplazar un valor en untxt

[RootK]

solo copia y pega el siguiente code:

string sFile = "f:\\Visual Studio 2005/Projects/WindowsApplication1/WindowsApplication1/Consecutivo.txt";
if (File.Exists(sFile)) {
File.Delete(sFile);
FileStream file = new FileStream(sFile, FileMode.OpenOrCreate, FileAccess.Write);
StreamWriter sw = new StreamWriter(file);
sw.Write(Consecutivo);
sw.Close();
file.Close();
}