System.IO.File.AppendAllText(@"My_Out_text.txt", textBox1.Text , System.Text.Encoding.UTF8);
private static void Save(string data) { StreamWriter SaveMyData = new StreamWriter("My_Out_text.txt", true, Encoding.GetEncoding("windows-1251")); SaveMyData.Write(data); SaveMyData.Close(); }
Save(textBox1.Text);