//Calculation button private void CalculateToolStripButton_Click(object sender, EventArgs e) { var selectColumns = SelectTextBox.Text.Replace(" ", string.Empty).Split(','); var classColumn = ClassTextBox.Text.Replace(" ", string.Empty); if (selectColumns == null || selectColumns.Length == 0 || string.IsNullOrEmpty(classColumn)) { MessageBox.Show(@"Error. Please add data"); } else { ToConsole(@"Calculating"); var answer = _nb.Calculate(_newTestObject, _fileData, selectColumns, classColumn); ToConsole(@"Answer -> " + answer); } }