*.txt

Question

private void SaveFile()
       {
           Stream myStream;
           SaveFileDialog saveFileDialog1 = new SaveFileDialog();

           saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
           saveFileDialog1.FilterIndex = 2;
           saveFileDialog1.RestoreDirectory = true;

           if (saveFileDialog1.ShowDialog() == DialogResult.OK)
           {
               if ((myStream = saveFileDialog1.OpenFile()) != null)
               {
                   rtb1.Text().get();
               }
           }
       }

当我试图获取一个richtextbox的文本并保存时，我使用这个方法，但总是出现错误，CS1955。