public void SaveTextBoxTextToFile(RichTextBox richTextBox){
string textToWrite = richTextBox.Text;
using(FileStream fs = new FileStream("./rich.txt", FileMode.OpenOrCreate)){
byte[] data = new UTF8Encoding(true).GetBytes(textToWrite);
fs.Write(info, 0, info.Length);
}
}
public string ReadTextBoxTextFromFile(){
byte[] buffer = null;
if(!File.Exists("./rich.txt")){
return;
}
using(FileStream fs = new FileStream("./rich.txt", FileMode.Open)){
fs.Read(buffer, 0, Convert.ToInt32(fs.Length));
}
return System.Text.Encoding.Default.GetString(buffer);
}