private void LoadBtn_Click(object sender, EventArgs e) { try { var fs = new FileStream(FileName, FileMode.Open, FileAccess.Read); ReadLinesFromFile(fs, out Data); fs.Close(); NumberData.TextChanged -= NumberData_TextChanged; NumberData.ReadOnly = false; NumberData.ResetText(); foreach (var value in Data) { NumberData.AppendText(value + "\n"); } NumberData.ReadOnly = true; NumberData.TextChanged += NumberData_TextChanged; } catch (Exception) {} }